(-)-N-((R)-Tetrahydrofurfuryl)noroxymorphone hydrochloride 62509-10-8 Morphinan-6-one, 4,5-epoxy-3,14-dihydroxy-17-((tetrahydro-2-furanyl)methyl)-, hydrochloride, (5-alpha,17(R))- Mr 2096-CL