17-beta-(Tetrahydro-2H-pyran-2-yloxy)estra-1,3,5(10)-trien-3-ol 17beta-Estradiol 3-tetrahydropyranyl ether 3589-90-0 ESTRA-1,3,5(10)-TRIEN-3-OL, 17-beta-(TETRAHYDRO-2H-PYRAN-2-YLOXY)- Estra-1,3,5(10)-triene-17-beta-diol-17-tetrahydropyranyl ether NSC 99694 RS-2290