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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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1.3 1.4 1.6<br />

FIG. 1. SKELETAL TYPES OF GERMACRANOLIDES.<br />

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O<br />

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FIG. 2. SKELETAL TYPES OF GUAIANOUDES.

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