A delta-4 C19 steroid that is produced not only in the TESTIS, but also in the OVARY and the ADRENAL CORTEX. Depending on the tissue type, androstenedione can serve as a precursor to TESTOSTERONE as well as ESTRONE and ESTRADIOL.

Synonyms: 409J2J96VR, Androst-4-ene-3,17-dione, delta-4-Androstenedione, delta 4 Androstenedione, 4 Androstene 3,17 dione, 4-Androstene-3,17-dione, Androstenedione