MOLECULE

1-Phenyl-2-pyrazoline

1-Phenyl-2-pyrazoline also known as N-phenylpyrazoline is a phenyl derivative of 2-pyrazoline in which the phenyl substituent is positioned on a nitrogen of 2-pyrazoline. 1-Phenyl-2-pyrazoline belongs to the class of organic compounds known as phenylpyrazolines. Phenylpyrazolines are compounds containing a phenylpyrazoline skeleton, which consists of a pyrazoline bound to a phenyl group. 1-Phenyl-2-pyrazoline is one of several structural isomers of phenylpyrazoline wherein the phenyl group is substituted at different positions of the pyrazoline ring. There are three different isomers of pyrazoline: 1-pyrazoline, 2-pyrazoline and 3-pyrazoline. They differ in the position of the double bond in the pyrazoline ring with 1-pyrazoline having the double bond between N-1 and N-2, in 2-pyrazoline between N-2 and C-3 and in 3-pyrazoline between C-3 and C-4. 1-Phenyl-2-pyrazoline is formed during the combustion of cannabis and is therefore a constituent of cannabis smoke (https://doi.org/10.1007/978-1-59259-947-9_2).