TL;DR: The chemical investigation of two Perymenium species afforded, in addition to known kaurane derivatives and 14-acetoxydesacetyl laurenobiolide, a new sesquiterpene, perydiscolic acid as mentioned in this paper.
TL;DR: The aerial parts of Perymenium hintonii gave, in addition to known coumarins, flavonoids and triterpenes, two new phytane-type diterpene named tuxpanolide and isotuxpanOLide.
TL;DR: Perymenium featherstonei afforded, in addition to the known ent-kaurene derivative 4α, 15-dihydroencelin, two closely related epimeric acids as discussed by the authors.
TL;DR: The aerial parts of Perymenium mendezii var. verbesinioides were elucidated by chemical and spectroscopic methods as mentioned in this paper, yielding two new lactones, the eudosmanolide desacetyl-β-cyclotulipinolide and the melampolide perymeniolide.