Crystallise it from AcOH or EtOH (plates, m 125.5-126o). The picrate has m 130-131o (orange-red needles from EtOH). [Tatta & Bardhan J Chem Soc (C) 893 1968, Beilstein 5 IV 2433.]
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![16,17-Dihydro-17-methyl-15H-cyclopenta[a]phenanthrene Structure](/CAS/GIF/549-38-2.gif)