prov:value
| - oalkyl, substituted or unsubstituted phenyl, alkenyl, or substituted or unsubstituted aralkyl, R6 and R7 are same or different and are a hydrogen atom, substituted or unsubstituted alkyl, cycloalkyl, substituted or unsubstituted phenyl, alkenyl, or substituted or unsubstituted aralkyl, R6 and R7 may from a morpholine ring, ##STR4## wherein R8 is lower alkyl, or substituted or unsubstituted aryl, R
|