Determination of Optimum Excipients for Platanus orientalis Pollen Extract by Accelerating Chemical Stability Test and Their Synergistic Effect Hasan Mansouritorghabeh1, Mojtaba Sankian2, Abdol-RezaVarasteh1, Malihe Moghadam2, Bahman Khameneh3, Reza Farid-Hosseini1, — Reports of Biochemistry & Molecular Biology — RBMB