pyran,ethynyl,methyl,2h-pyran,2h-pyran-2-one
2H-pyran
648903-64-4Propanoic acid, 2,2-dimethyl-,(2S,3R,4S)-3-ethenyl-4-(1-formylethenyl)tetrahydro-2H-pyran-2-yl ester
165198-47-01H,3H-Pyrano[3,4-c]pyran-1-one,5-ethenyl-6-[[4,6-O-[2-[3-ethenyl-2-(b-D-glucopyranosyloxy)-3,4-dihydro-5-(methoxycarbonyl)-2H-pyran-4-yl]ethylidene]-b-D-glucopyranosyl]oxy]-4,4a,5,6-tetrahydro-,[4aS-[4aa,5b,6a[S*(2R*,3S*,4R*)]]]-