A compound of Formula (I) or a pharmaceutically acceptable ester, amide, solvate, or salt thereof, or a salt of such an ester or amide or a solvate of such an ester amide or salt wherein the definitions of R.sub.1-R.sub.13 and L.sub.1-L.sub.4 are provided in the disclosure, and wherein R.sub.14 is a group capable of binding to prostate-specific membrane antigen (PSMA).

##STR00001##

A water-based ink for ink-jet recording includes: a solid solution of a quinacridone pigment including C.I. Pigment Red 122 and C.I. Pigment Violet 19; an azo pigment including C.I. Pigment Red 146; and water. Mass ratio (Q:A) of a content amount (Q) of the solid solution of the quinacridone pigment to a content amount (A) of the azo pigment in an entire amount of the water-based ink is in a range of 9:1 to 1:9.

A compound of Formula I or a pharmaceutically acceptable ester, amide, solvate, or salt thereof, or a salt of such an ester or amide or a solvate of such an ester amide or salt: ##STR00001## wherein the definitions of R.sub.1-R.sub.13 and L.sub.1-L.sub.4 are provided in the disclosure, and wherein R.sub.14 is a group capable of binding to prostate-specific membrane antigen (PSMA).