prov:value
| - Here, the substituent of the optionally substituted benzyl for R1 to R4 includes, for example, a halogen atom such as fluorine, chlorine, bromine, etc., cyano group, benzoyl group, alkyl group, a halogenated alkyl group such as trifluoromethyl, an optionally substituted phenyl group (said substituent includes, for example, a halogen atom such as fluorine, chlorine etc., a halogenated alkyl group s
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