3H-1,2,4-Triazole-3-thione, 5-amino-4-[4-cyclopropyl-1-naphthalenyl]-2,4-dihydro, commonly referred to as 5-amino-4-[4-cyclopropyl-1-naphthalenyl]-1,2,4-triazole-3-thione or simply TTTA, is a heterocyclic compound that features a triazole core linked to a naphthalene ring. The triazole ring is a five-membered ring containing three nitrogen atoms, while the naphthalene ring is a six-membered aromatic ring fused to a second benzene ring.