Fragment-based drug design

Layer 2 — Chemistryin the medicinal-chemistry subtree

Screens small (MW<300) 'fragments' at high concentration via NMR/SPR/X-ray; hits are fused or grown into lead compounds. Delivered e.g. vemurafenib (melanoma). Rule-of-three (MW<300, logP<3, HBD≤3, HBA≤3) guides library design.

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