Methyl 7-oxo-12-propylamino-13-nitrodeisopropyldehydroabietate

Abstract

In the title compound, C21H28N2O5 (systematic name: methyl 1,4a-dimethyl-7-nitro-9-oxo-6-propylamino-1,2,3,4,4a,9,10,10a-octahydrophenanthrene-1-carboxylate) the cyclohexane ring (A) and the central cyclohexene ring (B) exist at a trans ring junction, with the two methyl groups in the axial positions of the six-membered rings. Ring A has a chair conformation and ring B a half-chair conformation. An intramolecular N—H...O hydrogen bond occurs. The crystal structure is stabilized by intermolecular C—H...O and N—H...O interactions.