prov:value
| - clic group which may be optionally substituted??? represented by R1 include (1) a lower alkyl (for example, C1-6 alkyl such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, and hexyl and the like) which may be optionally substituted with a substituent selected from a halogen atom (for example, fluorine, chlorine, bromine and iodine, and the like) and C1-6 alkoxy which may
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