1099-45-2 InChI=1/C22H21O2P/c1-2-24-22(23)18-25(19-12-6-3-7-13-19,20-14-8-4-9-15-20)21-16-10-5-11-17-21/h3-18H,2H2,1H acetic acid, (triphenylphosphoranylidene)-, ethyl ester ethyl (triphenylphosphoranylidene)acetate