Assertion: estrone | /r/HasProperty | isolated
Facets:
Source sentences:
text: 17β-estradiol and estrone were isolated and identified in extracts of placentas and perfusates.
text: Estrone was isolated and purified independently by Allen and Doisy and German scientist Adolf Butenandt in 1929, and estriol was isolated and purified by Marrian in 1930; they were the first estrogens to be identified.