For this purpose, 2,5-dihydrobenzoic acid (DHB)was prepared in a concentration of 20 mg/mL in a solution of acetonitrile and 0.1% trifluoroacetic acid (30/ 70; v/v, TA30)
For thispurpose, 2,5-dihydrobenzoic acid (DHB)was prepared in a concentrationof 20 mg/mL in a solution of acetonitrile and 0.1% trifluoroacetic acid (30/70; v/v, TA30)