A compound represented by general formula (I) below, or a pharmacologically acceptable salt thereof:
wherein X represents sulfonic acid group; R
1
and R
2
represent substituents; R
3
to R
6
represent optionally substituted alkyl groups; R
7
and R
8
represent an optionally substituted alkyl groups; L
1
to L
3
represent optionally substituted methine groups, with at least one of L
1
to L
3
being a methine group having a substituent with the bulkiness of an ethyl group or greater; r represents an integer of from 0 to 3, and when r is 2 or more, the plural L
2
and the plural L
3
may be the same or different, respectively; each of m and n independently represents an integer of 0 to 3; and at least one of the substituents is sulfonic acid group or a group comprising sulfonic acid group, which is useful as an imaging component in a near infrared fluorescence imaging agent.
以下是通用公式(I)表示的化合物,或其药理学可接受的盐:其中X代表
磺酸基团;R1和R2代表取代基;R3到R6代表可选择取代的烷基基团;R7和R8代表可选择取代的烷基基团;L1到L3代表可选择取代的亚甲基基团,其中至少有一个L1到L3是含有乙基基团或更大体积的取代基的亚甲基基团;r代表从0到3的整数,当r为2或更多时,复数
L2和复数L3可以分别相同或不同;m和n各自代表从0到3的整数;并且至少一个取代基是
磺酸基团或包含
磺酸基团的基团,可用作近红外
荧光成像剂中的成像组分。