Evolution of Sesquiterpene Lactones in Angiosperms*
Evolution of Sesquiterpene Lactones in Angiosperms*
Evolution of Sesquiterpene Lactones in Angiosperms*
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146 VICENTE DE P. EMERENCIANO, MARIA AUXILIADORA C. KAPLAN AND O1"~'O R. GOI-I'UEB<br />
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FIG. 1. SKELETAL TYPES OF GERMACRANOLIDES.<br />
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FIG. 2. SKELETAL TYPES OF GUAIANOUDES.