“starting material”造句，怎麼用starting material造句

The two key intermediate ketones (A_3) and (B_8) were obtained respectively by the use of the starting material resorcinol.

Screening for 2 - bromo-butyric acid as the starting material, after ammonolysis, esterification, ester amine solution, split, five-step cyclization reaction Levetiracetam.

Using fatty alcohol as starting material, double octyl quaternary ammonium bromide was obtained. It's yield reached 80%.

Along with the rapid development in photovoltaic market, silicon is used to produce solar cell more than 90% as the starting material for crystalline silicon wafers.