Table 2.

The information of nodes and edges in the heterogeneous network

Node type	Num	Edge type	Num
Drug	1094	Drug–drug	1 19 6836
Protein	1556	Drug–protein	1 1819
Chemical structure	881	Drug–chemical substructure	13 3880
Side effect	4063	Drug–side effect	12 2792
Substituent	738	Drug–substituent	2 0798
GO term	4098	Protein–GO term	3 5980
		Protein–protein	2 42 1136