Division 5.3.2 Spray the completely dried plate with the solution 3.3 (a).

Allow to dry at room temperature for 1 minute and immediately spray with the solution 3.3 (b).

Dry the plate in an oven at 60 ^oC. The spots appear an orange colour. Alpha-monoglyceryl 4-aminobenzoate: R_F 0,07; ethyl 4-aminobenzoate: R_F 0,55.