(1S,4R,5R,6R)-6-methoxycarbonyl-4-pivaloyloxy-2-(pivaloyloxymethyl)bicyclo(3.1.0)hex-2-ene-1-carboxylic acid
(1s,4r,5r,6r)-6-methoxycarbonyl-4-pivaloyloxy-2-(pivaloyloxymethyl)bicyclo(3.1.0)hex-2-ene-1-carboxylic acid