Composition for contrast imaging of cancer

A composition for contrast imaging of cancer, comprising a cyclodextrin-bonded indocyanine compound represented by formula (A), or a pharmaceutically acceptable salt thereof:

• wherein two Qs are each capable of being independently selected, are optionally the same or different, and are each *1-(CH2)a-CO—NH—(CH2)b-*3, wherein a is an integer of 2 or more and 6 or less, b is an integer of 2 or more and 6 or less, *1 in each Q is N of the indocyanine skeleton, and *3 is a bonding portion formed by replacing any one of three OH groups of any D-glucose contained in cyclodextrin with —O—;
• R1 to R23 each independently are a hydrogen atom, an alkyl group, an aryl group, a halogen atom, an alkoxyl group, an amino group, a carboxyl group, a formyl group, a sulfonyl group, a sulfonic acid group, a phosphoric acid group, an alkyloxycarbonyl group, an aryloxycarbonyl group, an alkylcarbonyl group, an arylcarbonyl group, or a heterocycle, R1 to R23 each independently are unsubstituted or substituted with a substituent, when the substituent is carboxylic acid, sulfonic acid, or phosphoric acid, a hydrogen ion is optionally dissociated from the substituent to be replaced with a metal ion;
• R8 and R9 optionally together form a cyclic structure of CH2, CH2CH2, CH2CH2CH2, or CH2CH2CH2CH2, and one or more hydrogen atoms of the cyclic structure is optionally substituted with an aryl group, a halogen atom, an alkoxy group, an amino group, a carboxyl group, a formyl group, a sulfonyl group, a sulfonic acid group, a phosphoric acid group, an alkyloxycarbonyl group, an aryloxycarbonyl group, an alkylcarbonyl group, an arylcarbonyl group, or a heterocycle.