dianol dianol dianol is a synthetic, nonsteroidal estrogen that was never marketed. it is a dimer and impurity of anol, and was, along with hexestrol, involved in erroneous findings of highly potent estrogenic activity with anol. although a potent estrogen, it requires a dose of 100 μg to show activity, whereas hexestrol shows activity with a mere dose of 0.2 μg. dianolidentifiers iupac name 4-phenol chemical and physical dataformulac18h20o2molar mass268.356 g·mol−13d model (jsmol)interactive image smiles ccc(\c(c)=c\c1=cc=c(o)c=c1)c1=cc=c(o)c=c1 inchi inchi=1/c18h20o2/c1-3-18(15-6-10-17(20)11-7-15)13(2)12-14-4-8-16(19)9-5-14/h4-12,18-20h,3h2,1-2h3/b13-12+key:lydgpzxljybdem-oukqbfozna-n