Table 3.

Error analysis of a random sample of max 25 false negatives from each class for ChemSpider (CS) and Chemlist (CL).

Error type	TRIV		SUM		IUPAC		FAM		ABB
	CS	CL	CS	CL	CS	CL	CS	CL	CS	CL
Partial match	0	3	0	0	0	0	0	0	0	0
Annotation error	0	2	0	0	0	1	0	0	0	0
Not in dictionary	25	15	22	16	25	24	25	24	25	8
Removed by disambiguation	0	5	0	7	0	0	0	1	0	12
Removed by manual check of highly frequent terms	0	0	0	1	0	0	0	0	0	2
Tokenization error	0	0	3	1	0	0	0	0	0	3