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Communication | Regular issue | Vol 27, No. 1, 1988, pp.83-87
Published online, 1st January, 1970
DOI: 10.3987/COM-87-4372
Isolation and Structure of New Pseudoguaianolides, 4-Epipulchellin and 4-Epineopulchellin from Gaillardia Pulchella

Kenzo Hariyama, Hitoshi Hori, Tamiko Ohkura, Takeshi Kawamata, Ji-Fu Gao, and Seiichi Inayama*

*Pharmaceutical Institute, School of Medicine, Keio University, Shinanomachi 35, Shinjuku, Tokyo 160-0016, Japan

Abstract

The structure of 4-epipulchellin (1a) and 4-epineopulchellin (1b), new pseudoguaianolide sesquiterpene lactones isolated from Gaillardia pulchella, was determined on the basis of spectroscopic data and chemical transformations from pulchellin (2a) and neopulchellin (2b) into 1a and 1b, respectively.