title: Ethyl ent-15α-[(2-meth-oxy-benz-yloxy)meth-yl]-16-oxobeyeran-20-oate.
abstract: The title compound, C(31)H(44)O(5), was synthesized from isostev-iol (systematic name: ent-16-ketobeyeran-19-oic acid). In the mol-ecule, the three six-membered rings adopt chair conformations and the stereochemistry of the A/B and B/C ring junctions are trans. The five-membered ring D adopts an envelope conformation with the methyl-ene C atom as the flap.
authors.forename: Ya
authors.initials: Y
authors.lastname: Wu
authors.forename: Xia
authors.initials: X
authors.lastname: Wang
authors.forename: Jian-Hong
authors.initials: JH
authors.lastname: Gong
authors.forename: Chang-Yong
authors.initials: CY
authors.lastname: Wei
authors.forename: Jing-Chao
authors.initials: JC
authors.lastname: Tao