prov:value
| - ed from the group consisting of hydroxy, OM wherein M is an alkali or alkaline earth metal, loWer-alkoxy, and -NR -R in which R and R are independently selected from the group consisting of hydrogen, lower-alkyl, phenyl, and benzyl and, together with the nitrogen atom, pyrrolidino, piperidino, morpholino, piperazino, N-loWer-alkyl piperazino, and mono and poly C-lower-alkyl derivatives thereof, at
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