InChI=1/C18H22O4S.Na/c1-18-9-8-14-13-5-3-12(23(20,21)22)10-11(13)2-4-15(14)16(18)6-7-17(18)19;/h3,5,10,14-16H,2,4,6-9H2,1H3,(H,20,21,22);/q;+1/p- OESTRON SODIUM SULFATE estra-1,3,5(10)-triene-3-sulfonic acid, 17-oxo-, sodium salt sodium 17-oxoestra-1,3,5(10)-triene-3-sulfonate