The pretreatment of FRPs was carried out as follows. The sarcocarp
was obtained by weeding out the stalk and seeds from FRPs.
Then the sarcocarp of peppers was cut up into small pieces of
2 2 mm approximately.
For optimizing the conditions of stage extraction, 10 g of FRPs
sarcocarp were put into a 100 mL glass flask and were immersed in
extractive solvent for 30 min. Then they were extracted by heat
refluxing extraction. The procedures of stage extraction were
shown in