prov:value
| - is a alkylene; and B is a group of the formula --N(R6) (R7) or ##STR7## wherein R6, R7 and R8 are the same or different and each is a hydrogen atom, an alkyl having 1-6 carbon atoms, a cycloalkyl having 3-6 carbon atoms, a phenyl C1 -C3 alkyl, a phenyl, a naphthyl, or a pyridyl, Ar is a phenyl, a naphthyl or a pyridyl and n is an integer of 0, 1 or 2 or an acid addition salt thereof; and a pharma
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