Table 2.

Statistics of sp³ stereochemical content in the KEGG Compound and BioMeta databases

Stereochemistry	OK	# in KEGG	# in BioMeta	# Corrected
Not possible	+	3725	3764
Undefined (i.e., omitted)	–	554	366	188
Incompletely defined – meso	–	24	3	21
Incompletely defined – absolute	–	1080	691	389
Incompletely defined – relative	–	294	171	123
Completely defined – meso	+	56	89
Completely defined – absolute	+	3735	4823
Completely defined – relative	–	2032	1669	363
Total not OK		3984	2900	1084
Total OK		7516	8676
Total		11500	11576

The numbers in this table give a more detailed breakdown of the sp³ stereochemistry enhancements from Table 1. Here "OK" means a single, completely defined, compound. The "unspecified enantiomer" cases from Table 1 are split here between two "relative" stereochemistry cases, incompletely and completely defined. Note that not all "Completely defined – relative" cases need to be errors – a number of drugs may be racemic compounds.