1 7BE (2~{R})-6,6,9,9-tetramethylspiro[3,4,7,8-tetrahydrobenzo[G]chromene-2,2'-3,4-dihydrochromene]-6'-carboxylic acid 1.000 2 5LO 4-[(11s,15r)-4,4,7,7-tetramethyl-16-oxatetracyclo[8.6.0.03,8.011,15]hexadeca-1(10),2,8-trien-11-yl]benzoic acid 0.788