title: Caulerpin.
abstract: The crystal structure of caulerpin (dimethyl 6,13-dihydrodibenzo[b,i]phenazine-5,12-dicarboxylate, C(24)H(18)N(2)O(4)), an indole alkaloid, reported in space group Cc with an acute beta angle, has been redetermined in the correct space group, C2/c. The molecule has twofold crystallographic symmetry and is composed of two essentially planar indole groups fused to an eight-membered cyclooctatetraene ring which adopts a boat conformation. The molecular dimensions are normal. The structure is stabilized by intermolecular and intramolecular interactions involving the indole N-H atom and carbonyl O atom [N.O 3.211 (4) and 2.836 (4) A].
authors.affiliation: Department of Chemistry, The University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4.
authors.forename: M
authors.initials: M
authors.lastname: Parvez
authors.forename: J
authors.initials: J
authors.lastname: Ara
authors.forename: V
authors.initials: V
authors.lastname: Sultana
authors.forename: R
authors.initials: R
authors.lastname: Qasim
authors.forename: V U
authors.initials: VU
authors.lastname: Ahmad