Abstract: Provided is a valve housing configured to be inserted into an insertion hole that extends in a direction approximately orthogonal to an extending direction of an oil path and configured to be freely movable along an extending direction of the insertion hole. When an oil jet switching valve is closed, the tip end portion of the valve housing is configured to be pressed to the inner wall surface of the oil path by receiving an energized force from an energizing unit.

Abstract: A structure for attaching an oil jet valve includes a bracket secured to an internal combustion engine with a seal member, an attachment concavity extending through the interior of the bracket, an insertion hole extending through the interior of the internal combustion engine, an oil jet valve, a first stepped part formed in the oil jet valve, a second stepped part formed in the attachment concavity, and an interlocking member. The width of a wide part of the first stepped part is less than the width of a narrow part of the second stepped part. The width of the wide part of the first stepped part is less than the width of a portion, of the inner surface of the attachment concavity, that faces the wide part of the first stepped part.

Abstract: A structure for attaching an oil jet valve includes a bracket secured to an internal combustion engine with a seal member, an attachment concavity extending through the interior of the bracket, an insertion hole extending through the interior of the internal combustion engine, an oil jet valve, a first stepped part formed in the oil jet valve, a second stepped part formed in the attachment concavity, and an interlocking member. The width of a wide part of the first stepped part is less than the width of a narrow part of the second stepped part. The width of the wide part of the first stepped part is less than the width of a portion, of the inner surface of the attachment concavity, that faces the wide part of the first stepped part.

Abstract: Provided is a valve housing configured to be inserted into an insertion hole that extends in a direction approximately orthogonal to an extending direction of an oil path and configured to be freely movable along an extending direction of the insertion hole. When an oil jet switching valve is closed, the tip end portion of the valve housing is configured to be pressed to the inner wall surface of the oil path by receiving an energized force from an energizing unit.

Abstract: The present invention provides a compound which has affinity with amyloid, shows sufficiently rapid clearance from normal tissues and is suppressed in toxicity such as mutagencity. Provided is a compound represented by the following formula (1) or a salt thereof: wherein A1, A2, A3 and A4 independently represents a carbon or nitrogen; R1 is a halogen substituent; R2 is a halogen substituent; and m is an integer of 0 to 2, provided that at least one of R1 and R2 is a radioactive halogen substituent, at least one of A1, A2, A3 and A4 represents a carbon, and R1 binds to a carbon represented by A1, A2, A3 or A4 as well as a low-toxic diagnostic agent comprising a compound represented by the preceding formula or a salt thereof.

Abstract: A compound effective as a probe targeting amyloid for image diagnosis and a reagent comprising the compound for detecting amyloid deposited on a biological tissue are provided. Provided are a compound represented by the following formula (1): wherein R1, R2 and R3 independently represent a group selected from the group consisting of a hydrogen, hydroxyl group, alkyl substituent with 1 to 4 carbon atoms, alkoxy substituent having alkyl chain with 1 to 4 carbon atoms and halogen substituent, excluding the case where two or more of the substituents R1, R2 and R3 are hydrogen, R4 is a group selected from the group consisting of a hydrogen, hydroxyl group, alkoxy substituent having alkyl chain with 1 to 4 carbon atoms and halogen substituent, and m is an integer of 1 to 4, provided that at least one of R1, R2, R3 and R4 represents a radioactive halogen substituent, and a reagent comprising the same.

Abstract: The present invention provides a compound which has affinity with amyloid, shows sufficiently rapid clearance from normal tissues and is suppressed in toxicity such as mutagencity. Provided is a compound represented by the following formula (1) or a salt thereof: wherein A1, A2, A3 and A4 independently represents a carbon or nitrogen; R1 is a halogen substituent; R2 is a halogen substituent; and m is an integer of 0 to 2, provided that at least one of R1 and R2 is a radioactive halogen substituent, at least one of A1, A2, A3 and A4 represents a carbon, and R1 binds to a carbon represented by A1, A2, A3 or A4 as well as a low-toxic diagnostic agent comprising a compound represented by the preceding formula or a salt thereof.

Abstract: The present invention provides a compound which has affinity with amyloid, shows sufficiently rapid clearance from normal tissues and is suppressed in toxicity such as mutagencity. Provided is a compound represented by the following formula (1) or a salt thereof: wherein A1, A2, A3 and A4 independently represents a carbon or nitrogen; R1 is a halogen substituent; R2 is a halogen substituent; and m is an integer of 0 to 2, provided that at least one of R1 and R2 is a radioactive halogen substituent, at least one of A1, A2, A3 and A4 represents a carbon, and R1 binds to a carbon represented by A1, A2, A3 or A4 as well as a low-toxic diagnostic agent comprising a compound represented by the preceding formula or a salt thereof.

Abstract: A compound that has affinity with amyloid, exhibits sufficiently rapid clearance from normal tissues, and is suppressed in toxicity such as mutagenicity is provided, which is represented by the following formula (1): or a salt thereof, wherein R1 is a group selected from hydrogen, hydroxyl group, carboxyl group, sulfate group, amino group, nitro group, cyano group, an alkyl substituent with one to 4 carbon atoms or an alkoxy substituent with one to 4 carbon atoms; R2 is a radioactive halogen substituent; and m is an integer of 0 to 2, and a low-toxic diagnostic agent for Alzheimer's disease comprising a compound represented by the above formula or a salt thereof is also provided.

Abstract: A compound represented by the following formula or a salt thereof: wherein each of A1, A2, A3 and A4 independently represents a carbon or nitrogen, R1 is a radioactive halogen substituent, R2 is a group selected from the group consisting of hydrogen, a hydroxyl group, a methoxy group, a carboxyl group, an amino group, an N-methylamino group, an N,N-dimethylamino group and a cyano group, and p is an integer of 0 to 2, provided at least one of A1, A2, A3 and A4 represents a carbon, and R1 binds to a carbon represented by A1, A2, A3 or A4, is effective as an image diagnosis probe targeting amyloid. A diagnostic agent for Alzheimer's disease contains the compound.

Abstract: The invention relates to a compound which has affinity with amyloid, shows sufficiently rapid clearance from normal tissues and is suppressed in toxicity such as mutagenicity, and also relates to a low-toxic diagnostic agent for Alzheimer's disease containing the compound. The compound is represented by the following formula (1) or a salt thereof: wherein A1, A2, A3 and A4 independently represent a carbon or a nitrogen, and R3 is a group represented by the following formula: wherein R1 is a radioactive halogen substituent; m is an integer of 0 to 4; and n is an integer of 0 or 1, provided that at least one of A1, A2, A3 and A4 represents a carbon, and R3 binds to a carbon represented by A1, A2, A3 or A4.

Abstract: The invention relates to a compound which has affinity with amyloid, shows sufficiently rapid clearance from normal tissues and is suppressed in toxicity such as mutagenicity, and also relates to a low-toxic diagnostic agent for Alzheimer's disease containing the compound. The compound is represented by the following formula (1) or a salt thereof: wherein A1, A2, A3 and A4 independently represent a carbon or a nitrogen, and R3 is a group represented by the following formula: wherein R1 is a radioactive halogen substituent; m is an integer of 0 to 4; and n is an integer of 0 or 1, provided that at least one of A1, A2, A3 and A4 represents a carbon, and R3 binds to a carbon represented by A1, A2, A3 or A4.

Abstract: A compound effective as a probe targeting amyloid for image diagnosis and a reagent comprising the compound for detecting amyloid deposited on a biological tissue are provided. Provided are a compound represented by the following formula (1): wherein R1, R2 and R3 independently represent a group selected from the group consisting of a hydrogen, hydroxyl group, alkyl substituent with 1 to 4 carbon atoms, alkoxy substituent having alkyl chain with 1 to 4 carbon atoms and halogen substituent, excluding the case where two or more of the substituents R1, R2 and R3 are hydrogen, R4 is a group selected from the group consisting of a hydrogen, hydroxyl group, alkoxy substituent having alkyl chain with 1 to 4 carbon atoms and halogen substituent, and m is an integer of 1 to 4, provided that at least one of R1, R2, R3 and R4 represents a radioactive halogen substituent, and a reagent comprising the same.

Abstract: The invention provides a reagent for detecting amyloid in a biological tissue which can be detect amyloid in vitro and in vivo with high sensitivity using a compound which has affinity with amyloid and is suppressed in toxicity such as mutagenicity. The reagent for detecting amyloid deposited in a biological tissue comprises a compound represented by the following formula (1) or a salt thereof: wherein A1, A2, A3 and A4 independently represents a carbon or nitrogen; R1 is a halogen substituent; R2 is a halogen substituent; and m is an integer of 0 to 2, provided that at least one of R1 and R2 is a radioactive halogen substituent, at least one of A1, A2, A3 and A4 represents a carbon, and R1 binds to a carbon represented by A1, A2, A3 and A4.

Abstract: The invention provides a reagent for detecting amyloid deposited in a biological tissue which can detect amyloid in vitro and in vivo with high sensitivity using a compound which has affinity with amyloid and is suppressed in toxicity such as mutagencity. The reagent for detecting amyloid deposited in a biological tissue comprises a compound represented by the following formula (1) or a salt thereof: wherein A1, A2, A3 and A4 independently represent a carbon or nitrogen; R1 is a radioactive halogen substituent; R2 is a group selected from the group consisting of hydrogen, hydroxyl group, methoxy group, carboxyl group, amino group, N-methylamino group, N,N-dimethylamino group and cyano group; and m is an integer of 0 to 2, provided that at least one of A1, A2, A3 and A4 represents a carbon, and R1 binds to a carbon represented by A1, A2, A3 and A4.

Abstract: The invention relates to a compound which has affinity with amyloid, shows sufficiently rapid clearance from normal tissues and is suppressed in toxicity such as mutagenicity, and also relates to a low-toxic diagnostic agent for Alzheimer's disease containing the compound. The compound is represented by the following formula (1) or a salt thereof: wherein A1, A2, A3 and A4 independently represent a carbon or a nitrogen, and R3 is a group represented by the following formula: wherein R1 is a radioactive halogen substituent; m is an integer of 0 to 4; and n is an integer of 0 or 1, provided that at least one of A1, A2, A3 and A4 represents a carbon, and R3 binds to a carbon represented by A1, A2, A3 or A4.

Abstract: The invention provides a reagent for detecting amyloid in a biological tissue which can detect amyloid in vitro and in vivo with high sensitivity using a compound which has affinity with amyloid and is suppressed in toxicity such as mutagenicity. The reagent for detecting amyloid deposited in a biological tissue comprises the compound represented by the following formula (1) or a salt thereof: wherein A1, A2, A3 and A4 independently represent a carbon or a nitrogen, and R3 is a group represented by the following formula: wherein R1 is a radioactive halogen substituent; m is an integer of 0 to 4; and n is an integer of 0 or 1, provided that at least one of A1, A2, A3 and A4 represents a carbon, and R3 binds to a carbon represented by A1, A2, A3 or A4.

Abstract: A compound effective as a probe targeting amyloid for image diagnosis and a reagent comprising the compound for detecting amyloid deposited on a biological tissue are provided. Provided are a compound represented by the following formula (1): wherein R1 is a group selected from the group consisting of a halogen substituent, alkyl substituent with 1 to 4 carbon atoms, alkoxy substituent having alkyl chain with 1 to 4 carbon atoms and hydroxyl group, R2 is a group selected from the group consisting of a cyano substituent, alkyl substituent with 1 to 4 carbon atoms and halogen substituent, R3 is a group selected from the group consisting of a hydroxyl group, halogen substituent and substituent represented by the following formula: (wherein R4 is a hydrogen, halogen substituent or hydroxyl group, and m is an integer of 1 to 4), provided that at least one of R1, R2, R3 and R4 represents a radioactive halogen, and a reagent comprising the same.

Abstract: The invention provides a reagent which can detect amyloid in vitro and in vivo with high sensitivity using a compound which has affinity with amyloid. The reagent for detecting amyloid deposited in a biological tissue comprises the compound represented by the following formula (1) or a salt thereof: wherein A1, A2, A3 and A4 independently represent a carbon or nitrogen, R2 is a group selected from the group consisting of a hydrogen, hydroxyl group, carboxyl group, sulfuric acid group, amino group, nitro group, cyano group, non-radioactive halogen substituent, alkyl substituent with 1 to 4 carbon atoms and alkoxy substituent with 1 to 4 carbon atoms, and R2 is a radioactive halogen substituent, provided that at least one of A1, A2, A3 and A4 represents a carbon, and R1 binds to a carbon represented by A1, A2, A3 or A4.

Abstract: A compound that has affinity with amyloid, exhibits sufficiently rapid clearance from normal tissues, and is suppressed in toxicity such as mutagenicity is provided, which is represented by the following formula (1): or a salt thereof, wherein R1 is a group selected from hydrogen, hydroxyl group, carboxyl group, sulfate group, amino group, nitro group, cyano group, an alkyl substituent with one to 4 carbon atoms or an alkoxy substituent with one to 4 carbon atoms; R2 is a radioactive halogen substituent; and m is an integer of 0 to 2, and a low-toxic diagnostic agent for Alzheimer's disease comprising a compound represented by the above formula or a salt thereof is also provided.