Abstract: The use of a protecting agent, for example a folate derivative such as folic acid or leucovorin, in combination with a non-competitive folic acid analogue, for example benzoquinazoline derivatives, for use in reducing the side effects associated with the administration of such non-competitive folic acid analogues, and pharmaceutical formulations comprising such combinations are disclosed.

Abstract: Compounds of formula (I) or salts thereof, wherein the dotted Line represents a single or double bond, R1 is alkyl or amino optionally substituted by alkyl, alkanoyl or benzyl group; R2, R3, R4 and R5 are the same or different and each is selected from hydrogen, phenyl, halo, nitro, a group S(O)nR8 wherein n is the integer 0, 1 or 2 and R8 is halo or alkyl or a group NR9R10 wherein R9 and R10 are both hydrogen, a group NR11R12 wherein R11 and R12 are the same or different and each is hydrogen or alkyl, a group OR13 wherein R13 is hydrogen or C1-4 of alkyl optionally substituted by halo; a C1-4 aliphatic group optionally substituted by a group OR14 or NR14R15 wherein R14 and R15 are the same or different and each is hydrogen or alkyl; or two of R2 to R5 are linked together to form a benzo group, or one of R2 to R5 is a group X—Y—R16 wherein X is CH2, NR17, CO or S(O)m and Y is CH2, NR17, O or S(O)m, or X—Y is O, NR17, —CH═CH— or N═N—, are disclosed as pharmacologic

Abstract: The use of a protecting agent, for example a folate derivative such as folic acid or leucovorin, in combination with a non-competitive folic acid analogue, for example benzoquinazoline derivatives, for use in reducing the side effects associated with the administration of such non-competitive folic acid analogues, and pharmaceutical formulations comprising such combinations are disclosed.

Abstract: The use of a protecting agent, for example a folate derivative such as folic acid or leucovorin, in combination with a non-competitive folic acid analogue, for example benzoquinazoline derivatives, for use in reducing the side effects associated with the administration of such non-competitive folic acid analogues, and pharmaceutical formulations comprising such combinations are disclosed.

Abstract: The use of a protecting agent, for example a folate derivative such as folic acid or leucovorin, in combination with a non-competitive folic acid analogue, for example benzoquinazoline derivatives, for use in reducing the side effects associated with the administration of such non-competitive folic acid analogues, and pharmaceutical formulations comprising such combinations are disclosed.

Abstract: The use of a protecting agent, for example a folate derivative such as folic acid or leucovorin, in combination with a non-competitive folic acid analogue, for example benzoquinazoline derivatives, for use in reducing the side effects associated with the administration of such non-competitive folic acid analogues, and pharmeceutical formulations comprising such combinations are disclosed.

Abstract: Compounds of formula (I) or salts thereof, wherein the dotted line represents a single or double bond, R1 is alkyl or amino optionally substituted by alkyl, alkanoyl or benzyl group; R2, R3, R4 and R5 are the same or different and each is selected from hydrogen, phenyl, halo, nitro, a group S(O)nR8 wherein n is the integer 0, 1 or 2 and R8 is halo or alkyl or a group NR9R10 wherein R9 and R10 are both hydrogen, a group NR11R12 wherein R11 and R12 are the same or different and each is hydrogen or alkyl, a group OR13 wherein R13 is hydrogen or C1-4 of alkyl optionally substituted by halo; a C1-4 aliphatic group optionally substituted by a group OR14 or NR14R15 wherein R14 and R15 are the same or different and each is hydrogen or alkyl; or two of R2 to R5 are linked together to form a benzo group, or one of R2 to R5 is a group X—Y—R16 wherein X is CH2, NR17, CO or S(O)m and Y is CH2, NR17, O or S(O)m, or X—Y is O, NR17, —CH═CH— or N═N—, are disclosed as pharmacologic

Abstract: Compounds of the formula (I) or salts thereof, ##STR1## wherein the dotted line represents a single or double bond, R.sup.1 is alkyl or amino optionally substituted by alkyl, alkanoyl or benzyl group: R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same or different and each is selected from hydrogen, phenyl, halo, nitro, a group S(O).sub.n R.sup.8 wherein n is the integer 0, 1 or 2 and R.sup.8 is halo or alkyl or a group NR.sup.9 R.sup.10 are both hydrogen, a group NR.sup.11 R.sup.12 wherein R.sup.11 and R.sup.12 are the same or different and each is hydrogen or alkyl, a group OR.sup.13 wherein R.sup.13 is hydrogen or C.sub.1-4 alkyl substituted by halo; a C.sub.1-4 aliphatic group optionally substituted by a group OR.sup.14 or NR.sup.14 R.sup.15 wherein R.sup.14 and R.sup.15 are the same or different and each is hydrogen or alkyl; ot two of R.sup.2 to R.sup.5 are linked together to form a benzp group, one of R.sup.2 to R.sup.3 is a group X--Y--R.sup.16 wherein X is CH.sub.2, NR.sup.17, CO, or S(O).sub.

Abstract: The present invention relates to novel benzoquinazoline thymidylate synthase inhibitors, to pharmaceutical formulations containing them and to their use in medicine.

Abstract: A composition for testing or treating microbial systems or infections, comprising an effective potentiating amount of a microbial dihydropteridine antagonist, which itself inhibits hydroxymethyldihydropteridine pyrophospokinase and has a sufficiently low toxicity, in combination with an effective amount of a competitor of para-aminobenzoic acid or an inhibitor of dihydrofolate reductase or both, its method of preparation, and its use in the inhibition of the production of dihydrofolic acid by microorganisms under in vivo or in vitro conditions.