87517-46-2
tert-butyl 6-dimethoxyphosphoryl-5-oxohexanoate
→
87517-56-4
5-oxo-6-phosphonohexanoic acid
59378-98-2
5-O-tert-butyl 1-O-methyl pentanedioate
1501-27-5
戊二酸单甲酯