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[(3S,7S,9E,11R,13S,14S,16R,19R)-10-Ethyl-14-hydroxy-3,9,13-trimethyl-5,12-dioxo-4,6,17-trioxatetracyclo[11.6.0.03,7.016,19]nonadec-9-en-11-yl] acetate


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