Yu-Chun Fang, Wen-Liang Wang, Wei Sun, Qian-Qun Gu, Wei-Ming Zhu
2007 Acta Crystallographica Section E  
The title compound, C 27 H 33 N 3 O 7 , isolated from the marinederived fungus Aspergillus sydowi and also known as verruculogen, contains six fused rings. The indole portion of the molecule adopts a planar conformation with a maximum deviation of 0.022 (2) A ˚. The six-membered ring with one N atom has a half-chair conformation, the six-membered ring with two N atoms has a boat conformation and the terminal five-membered ring has an envelope conformation. There is an intramolecular hydrogen
more » ... d between a hydroxyl group and a carbonyl O atom. Further O-HÁ Á ÁO hydrogen bonds link the molecules, forming a one-dimensional chain extending along the a axis.
doi:10.1107/s160053680705828x fatcat:lht7mioevjeunfigzb3pmmni6u