The title compound, C21H14N4OS, was prepared from the reaction of 1H-b
enzimidazol-2-ylthio)phenyl]-N'benzoylthiourea with dicyclohexylcarbod
iimide. A puckered seven-membered ring and a short H ... H contact bet
ween two rings cause the whole molecule to be non-coplanar, even thoug
h the delocalized pi-bonding system is planar. There is an intramolecu
lar hydrogen bond between the amine H atom and the O atom of the carbo
nyl group.