title: 7β-Hydroxy-artemisinin.
abstract: CRYSTALS OF THE TITLE COMPOUND [SYSTEMATIC NAME: (3R,6R,7S,8aR,9R,12aR)-7-hydr-oxy-3,6,9-trimethyl-octa-hydro-3,12-ep-oxy[1,2]dioxepino[4,3-i]isochromen-10(3H)-one], C(15)H(22)O(6), were obtained from microbial transformation of artemisinin by a culture of Cunninghamella elegans. The stereochemistry of the compound is consistent with the spectroscopic findings in previously published works. A weak O-H⋯O hydrogen bond occurs in the crystal structure, together with intermolecular C-H⋯O hydrogen bonds.
authors.forename: Paulo B
authors.initials: PB
authors.lastname: Carvalho
authors.forename: Bo
authors.initials: B
authors.lastname: Liu
authors.forename: Yunshan
authors.initials: Y
authors.lastname: Wu
authors.forename: John S
authors.initials: JS
authors.lastname: Williamson
authors.forename: Mitchell A
authors.initials: MA
authors.lastname: Avery