NameEstriolSynonyms1,3,5(10)-Estratriene-3,16a,17b-triol; Estra-1,3,5(10)-triene-3,16alpha,17beta-triolMolecular StructureMolecular FormulaC18H24O3Molecular Weight288.38CAS Registry Number50-27-1EINECS200-022-2PropertiesMelting point281-282 ºC Therapeutic use In pregnant women with multiple sclerosis (MS), estriol reduces the disease's symptoms noticeably, according to researchers at UCLA's Geffen Medical School.