1165-22-6 5-22-08-00089 (Beilstein Handbook Reference) BRN 0495808 DEA No. 9835 N-(1-(beta-(2-Thienyl)ethyl)-4-piperidyl)propioanilide N-Phenyl-N-(1-((2-thienyl)ethyl)-4-piperidinyl)propanamide Propionanilide, N-(1-(2-(2-thienyl)ethyl)-4-piperidyl)- Thiofentanyl