prov:value
| - ethyl, or n-propyl, aryl having from 6 to 10 carbon atoms such as phenyl or naphthyl, aralkyl having from 7 to 12 carbon atoms such as benzyl or phenylethyl, nitro and the like, (3) aralkyl having from 7 to 12 carbon atoms such as benzyl, phenylethyl, or naphthylmethyl, which may have 1 to 4 substituent(s) selected from a halogen atom such as chlorine, bromine, or fluorine, alkyl having from 1 to
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