TY - JOUR TI - Steroidal dihydropyrazines AU - Catsoulacos, P. AU - Souli, E. JO - Journal of Heterocyclic Chemistry PY - 1975 VL - 12 TODO - 1 SP - 193-194 PB - SN - 0022-152X, 1943-5193 TODO - 10.1002/jhet.5570120140 TODO - drug analysis; drug identification; drug structure; drug synthesis; in vitro study; infrared spectrometry; mass spectrometry; methodology; nuclear magnetic resonance spectroscopy; theoretical study TODO - null ER -