1. Faculty of Pharmaceutical SciencesCenter of Excellence for Drug Delivery SystemPrince of Songkla UniversityHat‐Yai90112Thailand
2. Faculty of Pharmaceutical SciencesDepartment of Pharmaceutical ChemistryPrince of Songkla UniversityHat‐Yai90112Thailand
3. School of PharmacyWalailak UniversityNakhon Si Thammarat80161Thailand