(3R,4R,5R)-3,4-Dihydroxy-5-(1-methoxycarbonyl-vinyloxy)-cyclohex-1-enecarboxylic acid methyl ester

compound Z1

methyl <(1R),1α,5β,6α>-5-<<1-(methoxycarbonyl)ethenyl>oxy>-8,8-dimethyl-7,9-dioxabicyclo<4.3.0>non-2-ene-3-carboxylate

methyl <(1R),1α,5β,6α>-5--8,8-dimethyl-7,9-dioxabicyclo<4.3.0>non-2-ene-3-carboxylate

2-Dimethylaminomethyl-2-((3aS,4R,7aR)-6-methoxycarbonyl-2,2-dimethyl-3a,4,5,7a-tetrahydro-benzo[1,3]dioxol-4-yloxy)-malonic acid dimethyl ester