| abstract |
A compound represented by general formula (IA) or a salt thereof useful as a fluorescent probe for zinc: wherein R 1 and R 2 represent a hydrogen atom or a group represented by formula (A), wherein X 1 , X 2 , X 3 , and X 4 represent a hydrogen atom, an alkyl group, a 2-pyridylmethyl group, or a protective group for an amino group, and m and n represent 0 or 1 provided that R 1 and R 2 do not simultaneously represent hydrogen atoms; R 3 and R 4 represent a hydrogen atom or a halogen atom; and R 5 and R 6 represent a hydrogen atom, an alkylcarbonyl group, or an alkylcarbonyloxymethyl group, and R 7 represents a hydrogen atom or an alkyl group. |