(2E)-3-[(2S,3aR,7aS)-4-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalen-2-yl)-2,3,3a,7a-tetrahydro-1-benzofuran-2-yl]prop-2-enoic acid
(2e)-3-[(2s,3ar,7as)-4-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalen-2-yl)-2,3,3a,7a-tetrahydro-1-benzofuran-2-yl]prop-2-enoic acid