"A progesterone derivative with antineoplastic activity. Testolactone inhibits steroid aromatase, thereby preventing the formation of estrogen from adrenal androstenedione and reducing endogenous estrogen levels. (NCI04)NCI" . . "C0039600"^^ . "23759"^^ . "C19H24O3"^^ . "Hormone"^^ . "FludestrinSYDTPNSC0023759" . "TeslacBRNCI" . "CHEBI:9460"^^ . "Delta-1-TestololactoneSNNCI" . "42916"^^ . "42916"^^ . "Testolactone"^^ . "13-Hydroxy-3-0x0-13,17-secoandrosta-1,4-dien-17-oic Acid Delta-LactoneSNNCI" . . "968-93-4"^^ . "6J9BLA949Q"^^ . "Steroid"^^ . "TeslacSYDTPNSC0023759" . "1,2,3,4,4a,4b,7,9,10,10a-Decahydro-2-hydroxy-2,4b-dimethyl-7-oxo-1-phenanthrenepropionic Acid Delta-LactoneSNNCI" . . "Testolactone"^^ . "17Alpha-oxo-D-homo-1,4-androstadiene-3,17-dioneSNNCI" . "Testolactone"^^ . . "FDA"^^ . "TESTOLACTONEPTFDA6J9BLA949Q" . "SQ-9538CNNCI" . "SQ 9538SYDTPNSC0023759" . "C2301"^^ . "FludestrinSYNCI" . "Therapeutic TestolactoneSYNCI" . "D-Homo-17a-oxaandrosta-1,4-diene-3,17-dioneSNNCI" . "1-DehydrotestololactoneSNNCI" . . "TestolactonePTNCI" .