2,4,5-Trimethoxy-2-methyl-tetrahydro-furan

methyl 4,4-dimethoxypentanoate

2-甲基吡咯

3-甲基哒嗪

(3S,3aR,6S,6aS)-3,6,6a-trihydroxy-6-(5-methylfuran-2-yl)-3,3a-dihydro-2H-furo[3,2-b]furan-5-one