76107-53-4

4'-Hydroxyfentanyl N-{1-[2-(4-Hydroxy-phenyl)-ethyl]-piperidin-4-yl}- N-phenyl-N-[1-[2-(4-hydroxyphenyl)ethyl]-4-piperidinyl]propanamide Propanamide, N-[1-[2-(4-hydroxyphenyl)ethyl]-4-piperidinyl]-N-phenyl- N-[1-[2-(4-HYDROXY-PHENYL)-ETHYL]-PIPERIDIN-4-YL]-N-PHENYL-PROPIONAMIDE