Quinoline Derivative Structures (2) and (3) - Chemical Diagrams #1820826 (License: Personal Use)

Structure (2) displays a quinoline core linked via a methylene bridge to a para-substituted benzene ring bearing a terminal alkyne and hydroxyl group (HO-CH₂-C≡C-). Structure (3) contains the same quinoline-benzyl backbone, but the benzene ring is substituted with a phenolic hydroxyl (-OH) ortho to a linear n-butyl chain. Both are synthetic intermediates in drug discovery, particularly for kinase inhibition or antimalarial development.

Used in scientific publications, patent applications, or pharmaceutical R&D webpages to illustrate molecular design strategies; targets researchers seeking structure-activity relationship (SAR) insights or synthetic routes for heterocyclic compounds.