title: Methyl-naltrexone bromide methanol monosolvate.
abstract: IN THE TITLE COMPOUND [SYSTEMATIC NAME: (4R,4aS,7aR,12bS)-3-cyclo-propyl-meth-yl-4a,9-hy-droxy-7-oxo-2,3,4,4a,5,6,7,7a-octa-hydro-1H-4,12-methano-benzofuro[3,2-e]isoquinolin-3-ium bromide methanol monosolvate], C(21)H(26)NO(4) (+)·Br(-)·CH(3)OH, two of the three six-membered rings adopt chair conformations while the third, which contains a C=C double bond, adopts an approximate half-boat conformation. The 2,3-dihydro-furan ring adopts an envelope conformation. In the crystal, the components are linked by O-H⋯O and O-H⋯Br hydrogen bonds. The absolute stereochemistry was inferred from one of the starting materials.
authors.forename: Guoqing
authors.initials: G
authors.lastname: Li
authors.forename: Xu
authors.initials: X
authors.lastname: Cai
authors.forename: Zhibing
authors.initials: Z
authors.lastname: Zheng
authors.forename: Xinbo
authors.initials: X
authors.lastname: Zhou
authors.forename: Song
authors.initials: S
authors.lastname: Li