Computational Study of Solvation Free Energy, Dipole Moment, Polarizability, Hyperpolarizability and Molecular Properties of Betulin, a Constituent of Corypha taliera (Roxb.). Dhaka Univ. J. Pharm. Sci. 2017;16(1):1-9. doi:10.3329/dujps.v16i1.33376