ethyl 4-hydroxypent-2-ynoate

2-methyl-3-phenylsulfanyl-2H-furan-5-one

2,3-二氢-2,5,6-三甲基吡嗪

1-(1-苄基-1H-1,2,3-噻唑-4-基)乙酮

hept-6-en-3-yn-2-ol