(3,4-diacetyloxy-6-chloro-5-hydroxyoxan-2-yl)methyl acetate

丙酮

methyl 2,3-anhydro-4,6-o-ethylidenehexopyranoside

硫酸

methyl 3,4-anhydro-6-O-triphenylmethyl-α-D-galactopyranoside