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What is the molecular formula of the compound with this IUPAC name [2-[(3R,3aS,5S,5aS,6R,9aS,9bS)-3-acetyloxy-6-but-3-ynyl-5-hydroxy-3a,6-dimethyl-7-oxo-2,4,5,5a,8,9,9a,9b-octahydro-1H-cyclopenta[a]naphthalen-3-yl]-2-oxoethyl] acetate ?
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C25H34O7
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