Exploring 14377. To explore a different substance…

{1-[2-(4-Ethyl-5-oxo-4,5-dihydro-1H-tetrazol-1-yl)ethyl]-4-[phenyl(propanoyl)amino]piperidin-4-yl}methyl acetate
 14377  C22H32N6O4  444.527
 Fentanyl
 InChI=1S/C22H32N6O4/c1-4-20(30)28(19-9-7-6-8-10-19)22(17-32-18(3)29)11-13-25(14-12-22)15-16-27-21(31)26(5-2)23-24-27/h6-10H,4-5,11-17H2,1-3H3
 UFJWUBXZEGCWLS-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCC(=O)N(C1(CCN(CC1)CCn1nnn(c1=O)CC)COC(=O)C)c1ccccc1