Synonyms: 5H-Cyclopenta[5,6]naphtho[1,2-h]quinazoline,chol-3-eno[3,4-d]pyrimidine deriv.; 5H-Cyclopenta[5,6]naphtho[1,2-h]quinazoline,6,6a,6b,7,8,8a,9,10,11,11a,11b,12,13,13a-tetradecahydro-6a,8a-dimethyl-9-(1-methylbutyl)-,[6aR-[6aa,6bb,8aa,9a(R*),11ab,11ba]]-; [6aR-[6aa,6bb,8aa,9a(R*),11ab,11ba]]-6,6a,6b,7,8,8a,9,10,11,11a,11b,12,13,13a-Tetradecahydro-6a,8a-dimethyl-9-(1-methylbutyl)-5H-cyclopenta[5,6]naphtho[1,2-h]quinazoline