Drug-likeness: Lipinski, Veber, QED
Molecular weight, LogP, hydrogen bond donors and acceptors, TPSA, plus Lipinski, Veber, Ghose, QED and synthetic accessibility.
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The rules are heuristics from oral drug development, not exclusion criteria. The calculator also returns the raw quantities so it stays visible which one a rule fails on.
The same thing from inside your language model
This calculator calls exactly the tool your language model can use over the Model Context Protocol, alongside the other tool families across analytics, toxicology and formulation. Test it free of charge.