1-Piperazinecarboxylic acid, 4-(5-oxo-5H-dibenzo(a,d)cyclohepten-10-yl)-, 2-methylpropyl ester 4-(5-Oxo-5H-dibenzo(a,d)cyclohepten-10-yl)-1-piperazinecarboxylic acid 2-methylpropyl ester RMI 61224 TL1475100