1,2-Benzenediol, 4-(1-methyl-3-piperidinyl)-, diacetate (ester), ethanedioate (1:1) 4-(1-Methyl-3-piperidinyl)-1,2-benzenediol diacetate (ester) ethanedioate (1:1) 62033-48-1 N-Methyl-3-(3',4'-diacetoxyphenyl)piperidine oxalate