| abstract |
An aerosol-generating system comprises: a nicotine source (8); and a delivery enhancing compound source (10). The delivery enhancing compound source comprises the reaction product of one or both of: (i) an alpha-keto carboxylic acid and a compound of formula (I), wherein R 1 is selected from alkyl, phenyl or substituted phenyl; or (ii) an alpha-hydroxy acid and a compound of formula (II), wherein X is halogen and R 2 is selected from H, alkyl, phenyl or substituted phenyl. |