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3-<(t-butyldimethylsilyl)oxy>oestra-1,3,5(10),9(11)-tetraen-17-one
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(8R,9S,13S,14S,17S)-3-(tert-Butyl-dimethyl-silanyloxy)-13-methyl-17-[3-(2-phenylethynyl-phenylethynyl)-phenylethynyl]-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-ol
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