a functional group composed of a carbon atom double-bonded to an oxygen atom
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3-{2-[1,1,3,3-Tetraoxo-2-(2-trimethylsilanyl-ethoxy)-2,3-dihydro-1H-1λ6,3λ6-benzo[1,3]dithiol-2-yl]-ethyl}-1-(toluene-4-sulfonyl)-1H-indole
Bicyclo[3.1.0]hexane, 6,6-dichloro-
4,8-Decadien-2-one, 5,9-dimethyl-, (E)-
3-(2-deoxy-β-D-erythro-pentofuranosyl)-5,6,7,8,9,10-hexahydro-6-hydroxy-6,10-methano<1,3>diazocino<1,2-a>purin-12(3H)-one
6-<(Ethoxythio)carbonyl>pyridin-2-carbonsaeure-ethylester
S-ethyl 2-(bromomethyl)-4-mesityl-2-methylbutanethioate
eq-dirhenium nonacarbonyl pyridine
2-Iodo-1-phenyl-1-butanone
1,1-Bis(methylthio)-2-fluoro-3-phenylprop-1-en-3-ol