Polyacetylenes from capitulum of Coreopsis tinctoria Isolation and quantitative determination of polyacetylenes in Bupleuri Radix Progress in studies on naturally occurring polyacetylenes Determination of two polyacetylenes in Herba Lobeliae Chinensis by HPLC analysis Chemical constituents of Bidens bipinnata Growth inhibition and action target of photo-activation induced by synthetic polyacetylenes against Echinochloa crusgalli Chemical constituents from roots of Campanumoea javanica and their antiangiogeneic activities Advances in studies on naturally occurring polyacetylene