1H-Indene-1-propanoic acid, 4-carboxy-5-(((1S,4S)-3,3-dimethyl-2-oxo-7-oxabicyclo(2.2.1)hept-1-yl)methyl)-2,6,7,7a-tetrahydro-7-hydroxy-beta,1,7a-trimethyl-, (betaR,1S,7R,7aS)- 83216-10-8