18,19-Dinorpregn-4-en-20-yn-3-one, 17-(acetyloxy)-13-ethyl-, 3-oxime, (17alpha)-, mixt. with (17alpha)-19 norpregna-1,3,5(10)-trien-20-yne-3,17-diol 79871-54-8 Cilest Ethinylestradiol-norgestimate mixt Norgestimate mixture with ethinyl estradiol Norgestimate-ethinylestradiol mixt Ortho Cylen Ortho Tri-Cyclen Ortho Tri-Cylen Pramino Prefest Tri Cyclen Tricilest Tricileste