1. Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, U.S.A.;2. Department of Botany, Louisiana State University, Baton Rouge, LA 70803, U.S.A.
Abstract:
Chemical analysis of Calea ternifolia var. calyculata yielded the known sesquiterpene lactone calein A, as well as two new modified heliangolid