Table 1.

Number of records and number of terms in the terminological resources.

Resource	Number of compounds	Number of terms	Structure
ChEBI	23,240	85,036	Yes
ChEMBL	22,245	29,488	Yes
ChemSpider	2,957,105	5,235,393	Yes
DrugBank	6516	31,991	Yes
HMDB	40,200	364,541	Yes
NPC	14,666	131,795	Yes
TTD	3,196	127,568	Yes
PubChem	4,235,189	19,420,462	Yes
Jochem	362,928	2,062,333	No
UMLS	329,464	743,791	No
ChEBI Family	22,635	90,166	No