methyl <1S,2S,3aS,7aR>-1,5,5-trimethyl-4,6-dioxa-(2,3,3a,4,5,6,7,7a)octahydroindene-2-carboxylate

<1S,2S,3aS,7aR>-1,5,5-trimethyl-2-phenylmethoxymethyl-4,6-dioxa-(2,3,3a,4,5,6,7,7a)octahydroindene

methyl (4S,5R)-α-diazo-2,2-dimethyl-5-ethyl-1,3-dioxanepropionate