1-carboxy-4α-methoxydiisophor-2(7)-en-3-one

9-imino-10-methoxy-4,6-dimethyl-2c-(2,6,6-trimethyl-cyclohex-1-enyl)-(4br,9aξ)-3,4b,6a,7,9,9a-hexahydro-2H-furo[3',4':5,6]benzo[1,2-c][1,8]naphthyridine-9bc-carbonitrile

dimethyl N-(tosylmethyl)iminocarbonate