4-methyl 5-(trimethylsilyl) (4R,5R)-2,2-dimethyl-1,3-dioxolane-4,5-dicarboxylate

(4R,5R)-methyl 2,2-dimethyl-5-(2-(triphenylphosphoranylidene)acetyl)-1,3-dioxolane-4-carboxylate

2,2-二甲氧基丙烷

(3aR,6aS)-2,2-Dimethyl-4-oct-(E)-ylidene-4,6a-dihydro-3aH-cyclopenta[1,3]dioxole

(3aS,6aR)-6-isopropoxy-2,2-dimethyldihydrofuro[3,4-d][1,3]dioxol-4(3aH)-one