上游原料
1,5-dibromopentaneethyl 2-methylpropanoate；ethyl isobutyrateEthyl 7-bromo-2,2-dimethylheptanoateTosylmethyl isocyanideDiethyl 8-isocyano-2,2,14,14-tetramethyl-8-(tosyl)pentadecanedioate2,2,14,14-tetramethyl-8-oxopentadecanedioic acid diethyl esterESP-15228;2,2,14,14-tetramethyl-8-oxopentadecanedioic acid
