Figure 2

Forty-one test structures collected from the Journal of Natural Products . Test molecules with a heavy atom count of ≤15 were collected only from recently published articles. All these structures were cross checked with the NMRShiftDB index to ensure that none of them was already present in the training index. The NP-Score for the given molecules were calculated using our previously reported NP-likeness calculator and is based on 3-sphere signature height.