hydrogen bond 59 Article 41 Hydrogen bonds 32 chemistry 32 unclassified drug 24 controlled study 23 Hydrogen Bonding 21 nonhuman 18 molecular docking 14 Humans 13 binding affinity 13 chemical structure 13 human 13 metabolism 13 crystal structure 12 molecular dynamics 12 binding site 11 hydrogen bonding 11 Fourier transform infrared spectroscopy 10 Binding Sites 9 infrared spectroscopy 9 Adsorption 8 Chitosan 8 Crystal structure 8 Hydrogen bonding 8 X ray diffraction 8 computer model 8 procedures 8 protein binding 8 synthesis 8