InChI=1/C10H19O4P/c1-5-10(4)8-9-14-15(11,12-6-2)13-7-3/h10H,5-7H2,1-4H diethyl 3-methylpent-1-yn-1-yl phosphate phosphoric acid, diethyl 3-methyl-1-pentynyl ester