Novel compounds having a light-responsive base and related techniques thereof are provided. A compound according to one aspect of the present invention is represented by the following formula (1): (In the formula (1), at least one of R1, R2, and R3 is a C1-C6 haloalkyl group, n R4 are each independently a C1-C6 alkyl group which may have a substituent, or a halogen atom, R5 is a methyl group, A trityl group and the like). JPEG2023183787000013.jpg62141

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