prov:value
| - The alkyl (and the alkyl of the acylamino group) represented by R11 to R15, R6, and R7 are preferably an alkyl having 1 to 20 carbon atoms and examples of the alkyl include straight, branched, and cyclic alkyls such as methyl, ethyl, propyl, n-butyl, sec-butyl, tert-butyl, cyclobutyl, pentyl, neopentyl, cyclopentyl, hexyl, cyclohexyl, heptyl, octyl, nonyl, and decyl.
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