pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
1.88	IUPAC digitized pKa	0	-1	CC[P@](=O)(O)OC	CC[P@](=O)([O-])OC	mol9077	CCP(=O)(O)OC