Synonyms: 4-piperidinecarboxylic acid, 1-[(8,9-dihydro-9,12,12-trimethyl-6,9-methano-1,3-dioxolo[4,5-b]phenazin-6(7H)-yl)carbonyl]-, ethyl ester;Ethyl 1-{[15,18,18-trimethyl-7,9-dioxa-3,13-diazapentacyclo[13.2.1.0~2,14~.0~4,12~.0~6,10~]octadeca-2(14),3,5,10,12-pentaen-1-yl]carbonyl}piperidine-4-carboxylate