prov:value
| - R3, R4, R10 and R11 each independently represents a hydrogen atom; or a C1-C6 alkyl group such as a methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, t-butyl group, n-pentyl group, isopentyl group, neopentyl group, t-pentyl group, n-hexyl group, isohexyl group, 1-methylpentyl group, or 2-methylpentyl group.
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