pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.03	IUPAC digitized pKa	0	-1	CCS[P@@](C)(=O)O	[CH2-][P@](=O)(O)SCC	mol9112	CCSP(C)(=O)O
3.20000004768372	QSARToolbox	0	-1	CCS[P@@](C)(=O)O	[CH2-][P@](=O)(O)SCC	mol9112	CCSP(C)(=O)O