1 7CP (4r)-7,8-dichloro-1',9-dimethyl-1-oxo-1,2,4,9-tetrahydrospiro[beta-carboline-3,4'-piperidine]-4-carbonitrile 1.000 2 KHC (4~{S})-7,8-bis(chloranyl)-9-methyl-1-oxidanylidene-spiro[2,4-dihydropyrido[3,4-B]indole-3,4'-piperidine]-4-carbonitrile 0.960 3 MB9 (4r)-7-chloro-9-methyl-1-oxo-1,2,4,9-tetrahydrospiro[beta-carboline-3,4'-piperidine]-4-carbonitrile 0.920