Fig. 2From: Development of Natural Compound Molecular Fingerprint (NC-MFP) with the Dictionary of Natural Products (DNP) for natural product-based drug developmentThe hierarchical tree of the molecular scaffolds. Based on the Bemis and Murko (BM) scaffold method, functional group of compounds removed. And then the ring systems in the molecular scaffolds are iteratively removed until an only single ring remains. In the hierarchical tree, each node means the molecular scaffolds and assigns a level based on the node position in the treeBack to article page