55.76
[]. M Agostinha R Matos, et al. Thermodynamic study of sesamol, piperonyl alcohol, piperonylic acid and homopiperonylic acid: a combined experimental and theoretical investigation. Org Biomol Chem. 004 Mar ;(6):908-4.
H5-H9-H5
P6-P64-P7-P80-P0+P5-P04+P40-P6+P64-P405-P50