available for functional bioluminescent substrates. We propose a new design strategy (designated as bioluminescent enzyme-induced electrontransfer: BioLeT) for luciferin-based bioluminescence probes. Luminescence measurements of a series of aminoluciferin derivatives confirmed that bioluminescence can be controlled by means of BioLeT. Based on this concept, we developed bioluminescence probes for nitric
A compound represented by the following general formula (I) or a salt thereof:
[wherein R
1
and R
2
represent hydrogen atom, a C
1-6
alkyl group, or a group represented by the following formula (A):
[wherein X
1
and X
2
represent hydrogen atom, or a group represented as —N(R
3
)(R
4
) (R
3
and R
4
represent hydrogen atom, a C
1-6
alkyl group, a C
1-6
alkylcarbonyl group, or a C
1-6
alkyloxycarbonyl group); and n represents an integer of
1
to
6
], provided that R
1
and R
2
do not simultaneously represent hydrogen atom), which is a novel luciferin derivative that serves as a luciferase substrate.