pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.73	IUPAC digitized pKa	0	-1	CCCCC[P@H](=O)O	CCCCC[P@H](=O)[O-]	mol9458	CCCCC[PH](=O)O