2-ethoxy-5,6,7,8,9,10-hexahydro-4H-cycloocta[d][1,3]thiazine

2,6-二甲基-1H-吡啶-4-硫酮

ethyl 6-chlorohex-2-ynoate

N-benzyl-2-methyl-3-oxobutanamide

ethyl N-(4-methoxynaphthalen-2-yl)carbamate