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Scintigrams (μCi) were taken 15 min after the administration of the Tc-99m-steroid derivatives. The pregnenolone-dihydrotestosterone conjugate (A) show different values on brain (196.44 μCi) in comparison with others biological compartments such as spleen (17.24 μCi) and gonads (11.08 μCi). Other data showed a biodistribution of the hemisuccinate of dihydrotestosterone (B) inseveral issues such as brain (176.9 μCi) spleen (10.80 μCi), and gonads (7.78 μCi).
