Crystal structure of erioflorin isolated from Podanthus mitiqui (L.)

• Main Authors: Cristian Paz, Leandro Ortiz, Uwe Schilde
• Format: Article
• Language: English
• Published: International Union of Crystallography 2017-03-01
• Series: Acta Crystallographica Section E: Crystallographic Communications
• Subjects: crystal structure; germacrane sesquiterpene lactone; Podanthus mitiqui
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S2056989017001700

The title compound, erioflorin, C19H24O6 [systematic name: (1aR,3S,4Z,5aR,8aR,9R,10aR)-1a,2,3,5a,7,8,8a,9,10,10a-decahydro-3-hydroxy-4,10a-dimethyl-8-methylidene-7-oxooxireno[5,6]cyclodeca[1,2-b]furan-9-yl methacrylate], is a tricyclic germacrane sesquiterpene lactone, which was isolated from Podanthus mitiqui (L.). The compound crystallizes in the space group P212121, and its molecular structure consists of a methacrylic ester of a ten-membered ring sesquiterpenoid annelated with an epoxide and a butyrolactone. The structure is stabilized by one intramolecular C—H...O hydrogen bond. An O—H...O hydrogen bond and further C—H...O interactions can be observed in the packing.