(5R,6R,7R,9R,13R,14S)-21-Cyclopropylmethyl-6,14-endo-ethano-2′,3′,4′,5′,7,8-hexahydro-4′,4′,5′,5′-tetramethylfurano[2′,3′6,7]normorphide hydrochloride methanol solvate

Abstract

The title compound, C28H38NO3+·Cl−·CH4O, is demeth­oxy‐buprenorphine hydro­chloride (buprenorphine degradation product). Crystal structure determination has confirmed that the elimination of methanol and rearrangement with the formation of a new ring proceeds with the retention of chirality of all chiral centres of the mol­ecule.