prov:value
| - a methyl or ethyl group, an alkoxycarbonyloxyalkyl group, in which the alkoxy part has from 1 to 4 carbon atoms, and the alkyl part is a methyl or ethyl group, a cycloalkoxycarbonyloxyalkyl group, in which the cycloalkoxy part has 5 or 6 carbon atoms, and the alkyl part is a methyl or ethyl group, a (5-phenyl-2-oxo-1,3-dioxolen-4-yl)methyl group, a (5-methyl-2-oxo-1,3-dioxolen-4-yl)methyl group, a
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