Alkylation with dialkylsulfate and diisopropylethylamine.
D000478:Alkylation; D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D005021:Ethylamines; D008745:Methylation; D013463:Sulfuric Acid Esters; D013464:Sulfuric Acids; D013806:Theophylline
D005021:Ethylamines; D013463:Sulfuric Acid Esters; D013464:Sulfuric Acids; C027070:N,N-diisopropylethylamine; D013806:Theophylline; C007482:dimethyl sulfate; C011612:diethyl sulfate