(3-Methyl-2,5-dioxo-1-imidazolidin-1-yl)methyl-5-(1-methyl-4-piperidinylidene)-5H-dibenzo(a,d)cycloheptene-3-carboxylate 5H-Dibenzo(a,d)cycloheptene-3-carboxylic acid, 5-(1-methyl-4-piperidinylidene)-, (3-methyl-2,5-dioxo-1-imidazolidinyl)methyl ester, (-)- 89149-85-9 L 646462 L-646,462