Alternating single and multiple bonds in a molecule, allowing for delocalized electrons
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1'-benzyl-2',3'-dihydro-1'H,10H-spiro[anthracene-9,4'-pyridine]
2-methyl-1,4-bis[2-(4-propionyloxypropyloxyphenyl)ethenyl]benzene
Me3Si(C13H6(Me)2B(2,4,6-triisopropylphenyl))2C13H6Me2SiMe3
3-(4,5-heptadienyl)-4-methyl-2-cyclohexen-1-one
1-dimethylphenylsilyl-4-trimethylsilyl-5-octen-1-yn-3-ol
C22H22O4
3,3-dimethoxypropanal
1-allyl-3-vinylbenzene
C25H33N5O12
hex-3-yn-2-yl 3-phenylpropiolate