| prov:value
| - oms, inclusive, 2-propynyl,2-propenyl, and alkyloxyacyl where alkyl is as defined above, and X.sub.1 is a member selected from the group consisting of:(a) phenyl,(b) a monosubstituted phenyl of the formula: ##STR27## wherein provided that only one of groups R, R.sub.1, R.sub.2, R.sub.3, R.sub.4 is other than hydrogen and R or R.sub.4 is alkyl of from 1 to 8 carbon atoms, inclusive, including isome
|