n-desmethylapalutamide n-desmethylapalutamide n-desmethylapalutamide is a nonsteroidal antiandrogen (nsaa) and the major active metabolite of apalutamide, an nsaa which is used as a hormonal antineoplastic agent in the treatment of metastatic prostate cancer. it has similar activity to that of apalutamide and, with apalutamide therapy, circulates at similar concentrations to those of apalutamide at steady state. n-desmethylapalutamide is formed from apalutamide in the liver by the cytochrome p450 enzymes cyp2c8 and cyp3a4. n-desmethylapalutamideclinical dataother namesdesmethylapalutamide; norapalutamidedrug classnonsteroidal antiandrogenpharmacokinetic dataprotein binding95%identifiers iupac name 4--8-oxo-6-sulfanylidene-5,7-diazaspirooctan-5-yl]-2-fluorobenzamide pubchem cid86683490chemical and physical dataformulac20h13f4n5o2smolar mass463.41 g·mol−13d model (jsmol)interactive image smiles c1cc2(c1)c(=o)n(c(=s)n2c3=cc(=c(c=c3)c(=o)n)f)c4=cn=c(c(=c4)c(f)(f)f)c#n inchi inchi=1s/c20h13f4n5o2s/c21-14-7-10(2-3-12(14)16(26)30)29-18(32)28(17(31)19(29)4-1-5-19)11-6-13(20(22,23)24)15(8-25)27-9-11/h2-3,6-7,9h,1,4-5h2,(h2,26,30)key:baanhoapfbhudx-uhfffaoysa-n