initial experiments in which confluent cells were exposed to 1 nm [ 3h ] 17 beta-estradiol for 24 h , revealed that the main metabolites formed by estrogen receptor positive mcf-7 and zr-75-1 cells were 17 beta-estradiol-3-sulfate ( together with lesser amounts of estrone sulfate ) and estrone .
C0059668
estrone sulfate
C0014942
estrone