1(S),3(R)-dihydroxy-20(R)-(4-hydroxy-4-trifluoromethyl-5,5-5-trif-luoro-1-pent-2-ynyloxymethyl)-9,10-sero-pregna-5(Z),7(E),10(19)-triene-alpha,25(OH)2D3
1(s),3(r)-dihydroxy-20(r)-(4-hydroxy-4-trifluoromethyl-5,5-5-trif-luoro-1-pent-2-ynyloxymethyl)-9,10-sero-pregna-5(z),7(e),10(19)-triene-alpha,25(oh)2d3