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7beta-Acetoxy-5beta,9beta:11beta,15beta:19alpha,23alpha-triepoxy-3alpha,9alpha,19beta-trihydroxy-25beta-[1(R)-hydroxyethyl]-13,21-bis(methoxycarbonylmethylene)-8,8,18,18-tetramethyl-20alpha-[octa-2(E) related products: