2,3-dihydroxy-24,34-tetraoxid-2-ene

2,2,4a,7,7-pentamethyl-1,2,3,4,4a,5,6,7-octahydro-1,8-naphthyridine (2R,5S,E)-5-(methoxymethoxy)-2-methylhex-3-enoate

ethene

丁二烯

2,4-已二烯