2-Amino-1,2-dihydronapthalene (2-ADN or ADN) is a stimulant drug. It is a rigid analogue of phenylisobutylamine and substitutes for amphetamine in rat drug discrimination tests, although at approximately one-fourth the potency.
The drug is closely related to 2-aminotetralin (2-AT; 2-amino-1,2,3,4-tetrahydronaphthalene), which also substitutes for amphetamine, and is about twice as potent as 2-AT in substituting for amphetamine. Other homologous and rigid analogues of amphetamine besides 2-ADN and 2-AT include 2-aminoindane (2-AI), 1-naphthylaminopropane (1-NAP), 2-naphthylaminopropane (2-NAP), 1-phenylpiperazine (1-PP), , and .