Abstract: Provided herein are compounds, preparations and formulations comprising pyrazine derivatives having multiple poly(ethylene glycol) containing substituents. Many of the compounds disclosed herein are excretable by the renal system of a subject or patient and are useful for visualizing the renal system of a subject or patient. Upon excitation by electromagnetic radiation, a number of the compounds disclosed herein exhibit luminescence and are externally detectable when present in the body fluid of a patient or subject. Also provided herein are methods for visualizing the renal system of a subject or patient.

Abstract: Provided herein are compounds, preparations and formulations comprising pyrazine derivatives having multiple poly(ethylene glycol) containing substituents. Many of the compounds disclosed herein are excretable by the renal system of a subject or patient and are useful for visualizing the renal system of a subject or patient. Upon excitation by electromagnetic radiation, a number of the compounds disclosed herein exhibit luminescence and are externally detectable when present in the body fluid of a patient or subject. Also provided herein are methods for visualizing the renal system of a subject or patient.

Abstract: In some embodiments, the invention provides modified pyrazine derivatives containing a central pyrazine ring with two secondary amine groups attached directly to the central pyrazine ring and two amino carbonyl groups attached directly to the central pyrazine ring. The secondary amine groups are terminated by alkyl groups containing from 1 to 6 carbons. The amino carbonyl groups can be terminated by a wide range of substituents including, but not limited to, alkyl and alkylene groups, polyether groups, including poly(ethylene glycol) groups, secondary and tertiary amine groups, polyhydroxylated alkyl groups, amino carbonyl groups, amino thioketone groups, and combinations thereof. In some embodiments, the invention provides modified pyrazine derivatives useful as optical agents in a wide variety of biomedical imaging procedures, including diagnostic and imaging procedures.

Abstract: Provided herein are compounds, preparations and formulations comprising pyrazine derivatives having multiple poly(ethylene glycol) containing substituents. Many of the compounds disclosed herein are excretable by the renal system of a subject or patient and are useful for visualizing the renal system of a subject or patient. Upon excitation by electromagnetic radiation, a number of the compounds disclosed herein exhibit luminescence and are externally detectable when present in the body fluid of a patient or subject. Also provided herein are methods for visualizing the renal system of a subject or patient.

Abstract: In some embodiments, the invention provides modified pyrazine derivatives containing a central pyrazine ring with two secondary amine groups attached directly to the central pyrazine ring and two amino carbonyl groups attached directly to the central pyrazine ring. The secondary amine groups are terminated by alkyl groups containing from 1 to 6 carbons. The amino carbonyl groups can be terminated by a wide range of substituents including, but not limited to, alkyl and alkylene groups, polyether groups, including poly(ethylene glycol) groups, secondary and tertiary amine groups, polyhydroxylated alkyl groups, amino carbonyl groups, amino thioketone groups, and combinations thereof. In some embodiments, the invention provides modified pyrazine derivatives useful as optical agents in a wide variety of biomedical imaging procedures, including diagnostic and imaging procedures.

Abstract: Provided herein are compounds, preparations and formulations comprising pyrazine derivatives having multiple poly(ethylene glycol) containing substituents. Many of the compounds disclosed herein are excretable by the renal system of a subject or patient and are useful for visualizing the renal system of a subject or patient. Upon excitation by electromagnetic radiation, a number of the compounds disclosed herein exhibit luminescence and are externally detectable when present in the body fluid of a patient or subject. Also provided herein are methods for visualizing the renal system of a subject or patient.

Abstract: In some embodiments, the invention provides modified pyrazine derivatives containing a central pyrazine ring with two secondary amine groups attached directly to the central pyrazine ring and two amino carbonyl groups attached directly to the central pyrazine ring. The secondary amine groups are terminated by alkyl groups containing from 1 to 6 carbons. The amino carbonyl groups can be terminated by a wide range of substituents including, but not limited to, alkyl and alkylene groups, polyether groups, including poly(ethylene glycol) groups, secondary and tertiary amine groups, polyhydroxylated alkyl groups, amino carbonyl groups, amino thioketone groups, and combinations thereof. In some embodiments, the invention provides modified pyrazine derivatives useful as optical agents in a wide variety of biomedical imaging procedures, including diagnostic and imaging procedures.

Abstract: The invention provides optical agents, including compositions, preparations and formulations, and methods of using and making optical agents. Optical agents of the present invention include oligomer dyes, and derivatives thereof, having a fused ring backbone structure having an oligothiophene core. In some embodiments, oligomer dyes of the present invention are fused ring thiophene dyes having an oligothiophene core comprising a plurality of fused thiophene, thiophene-oxide, and/or thiophene-dioxide rings, optionally functionalized to provide useful optical, biological, pharmacokinetic and/or physical properties. The compounds are dithieno[3,2-b;2?,3?-d]thiophene derivatives.

Abstract: The invention provides optical agents, including compositions, preparations and formulations, and methods of using and making optical agents. Optical agents of the present invention include dyes, and derivatives thereof, having a fused ring backbone structure having dithienofuran core. In some embodiments, dyes of the present invention are dithienofuran dyes having a dithienofuran core optionally functionalized to provide useful optical, biological, pharmacokinetic and/or physical properties.

Abstract: The invention provides optical agents, including compositions, preparations and formulations, and methods of using and making optical agents. Optical agents of the present invention include dyes, and derivatives thereof, having a fused ring backbone structure having dithienopyrrole core. In some embodiments, dyes of the present invention are dithienopyrrole dyes having a dithienopyrrole core optionally functionalized to provide useful optical, biological, pharmacokinetic and/or physical properties.