Structure of (±)-1β-tert-butoxy-3aα,4β,5,6,7,7a-hexahydro-7aβ-methyl-5-oxo-4α-indancarboxylic acid methyl ester at 153 K

The X-ray structure of (±)-1β-tert-butoxy-3aα,4β,5,6,7,7a-hexahydro-7aβ-methyl-5-oxo-4α-indancarboxylic acid methyl ester is reported, in which the six-membered ring adopts a pseudo chair conformation and the five-membered ring an envelope conformation