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A hydrocarbon connected by only single bonds.

A hydrocarbon containing at least one double bond, which does not have any stereoisomers.

A hydrocarbon containing at least one double bond, which has one or more stereoisomers.

A hydrocarbon, in which the carbon chain forms a cycle.

A hydrocarbon that forms a ring of any size.

A hydroxyl group bound to an sp3-hybridized carbon.

An oxygen atom between two sp3-hybridized carbons.

A three atom ring containing one oxygen atom and two carbon atoms in which all atoms are sp3-hybridized.

A carbonyl group in which the carbon is bound to a hydrogen as well as another carbon.

A carbonyl group in which the carbon is bound to two other carbons.

Two alkoxy groups (OR, R=alkyl) bound to an sp3-hybridized carbon.

A carbonyl group in which the carbon is bound to an alkoxy group (OR, R=alkyl) and another carbon.

A carbonyl group in which the carbon is bound to a hydroxyl group (OH) and another carbon.

A neutral, sp3-hybridized nitrogen atom, bound to sp3-hybridized carbons and/or hydrogen atoms.

A carbon-nitrogen triple bond.

A three atom ring containing one atom of nitrogen and two of carbon in which all atoms are sp3-hybridized.

A nitrogen atom bound to two oxygen atoms, in which one bond is single and the other is double.

A carbon-nitrogen double bond in which the carbon atom is bound to two other carbon atoms.

A carbonyl group in which the carbon atom is bound to an amino group.

A thiol group (SH) bound to a sp3-hybridized carbon.

An sulfur atom between two sp3-hybridized carbons.

A carbonyl group in which the carbon atom is bound to a sulfide group and another carbon atom.

A halogen atom bound to a carbon atom in an alkyl group (X = F, Cl, Br, I).

One to six substituents on benzene ring. (An example is presented on the right).

A ring containing at least one atom other than carbon, which does not satisfy the rules of aromaticity or antiaromaticity. (An example is presented on the right).

A ring containing at least one atom other than carbon, which satisfies the rules of aromaticity. (An example is presented on the right).

A class of hydrocarbons in which the molecules are composed of isoprene units (2-methylbut-1,3-diene). (An example is presented on the right).

A halogen bound to the carbon of a carbonyl group (X = F, Cl, Br, I).

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