“…Several polyacetylenes, such as cis -dehydromatricaria ester ( cis -DME), dehydromatricaria lactone, (2 Z ,8 Z )-10-tigloyloxy matricaria ester, (4 Z ,8Z)-10-trigloyloxy matricaria lactone, (2 Z ,8 Z )-10-angeloyloxy matricaria ester (methyl10-[( Z )-2-methyl-2-butenoyloxy]-(2 Z ,8 Z )-2,8-decadiene-4,6-diynoate) and (4 Z ,8 Z )-10-angeloyloxy matricaria lactone were isolated from the stems, roots and/or rhizomes of S. altissima [ 45 , 95 , 96 , 98 , 104 , 111 ]. Polyacetylenes in Asteraceae plants were reported to be synthesized from crepenynic acid, which is formed oleic acid with linoleic acid, introducing the first acetylene bond [ 95 , 112 ].…”