The main chain of atoms in a molecule, to which functional groups and side chains may be attached.
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Bicyclo[2.2.1]heptane-1-carbonyl chloride, 7,7-dimethyl-2-oxo-, (1S,4R)-
3-(3-benzoyl-5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-2-tert-butoxycarbonylaminopropionic acid benzyl ester
Carbamic acid, [[(2S,4R)-4-hydroxy-2-pyrrolidinyl]methyl]-, 1,1-dimethylethyl
5-[ISOCYANO-(TOLUENE-4-SULFONYL)-METHYL]-BENZO[1,3]DIOXOLE
