Nandrolone vs Norethindrone
Mechanistic comparison of Nandrolone C18 steroid with androgenic and anabolic properties. It is generally prepared from alkyl ethers of ESTRADIOL to resemble TESTOSTERONE but less and Norethindrone based on molecular target overlap from BindingDB and ChEMBL binding affinity data.
14
Shared Targets
50%
Jaccard Similarity
46%
IDF-Weighted Similarity
Jaccard measures raw target overlap. IDF-weighted downweights promiscuous hub targets (e.g. CYP enzymes) that bind many compounds non-specifically.
Evidence Comparison
Target Overlap
Nandrolone and Norethindrone share 14 molecular targets based on binding affinity data from BindingDB (Kd/IC50 ≤ 10 µM) and ChEMBL. A Jaccard index of 0.500 means 50% of the combined target set is bound by both compounds. The IDF-weighted score of 0.464 accounts for non-specific binding to metabolic enzymes.
Note: High target overlap does not imply identical mechanism or therapeutic equivalence. Binding affinity, tissue distribution, bioavailability, and downstream signaling differ significantly between compounds even when they bind the same protein.