(2R)-2-[(4R,5S)-5-ethenyl-2,2-dimethyl-1,3-dioxolan-4-yl]-1-methylethyl (2R,3R)-3-ethenyloxirane-2-carboxylate

(4E)-2,3-anhydro-4,5,8,10-tetradeoxy-6,7-O-(1-methylethylidene)-D-glycero-D-manno-dec-4-enonic acid 9-lactone