prov:value
| - The lower alkyl group represented by R2 or R3 is a straight-chain, branched or cyclic alkyl group of 1 to 6 carbon atoms, e.g. methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, n-pentyl, sec-pentyl, isopentyl, neopentyl, n-hexyl, isohexyl, cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl.
|