2-Propenoic acid, 3-[4-[2-(2-fluoro-11-ethyl-6,11-dihydro-5-methyl-6-oxo-5H-dipyrido[2,3-e:3',2'-b][1,4]diazepin-8-yl)ethoxy]-1-naphthalenyl]-2-methyl-, (2E)- AIDS-212818 AIDS212818