7X0 7x0 (1R,2S,4aS,4bS,8aS,10S,10aS)-2-[(2S)-3-methoxy-2-methyl-2-oxidanyl-3-oxidanylidene-propanoyl]-2,3,4b,8,8,10a-hexamethyl-10-oxidanyl-7,9-bis(oxidanylidene)-1,4a,5,6,8a,10-hexahydrophenanthrene-1-carboxylic acid 7X0