prov:value
| - is a bivalent aliphatic group which may have a substituent, or an arylene group which may have a substituent; R5, R6, R7, R8, R9, R10 and R11 each is a hydrogen atom, a halogen atom, an alkyl group having 1 to 5 carbon atoms which may have a substituent, an alkoxyl group having 1 to 5 carbon atoms which may have a substituent, or an aryl group which may have a substituent, and R5 and R6 may form
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