Exploring 14358. To explore a different substance…

{4-[Benzoyl(phenyl)amino]-1-(2-phenylethyl)piperidin-4-yl}methyl benzoate
 14358  C34H34N2O3  518.645
 Fentanyl
 InChI=1S/C34H34N2O3/c37-32(29-15-7-2-8-16-29)36(31-19-11-4-12-20-31)34(27-39-33(38)30-17-9-3-10-18-30)22-25-35(26-23-34)24-21-28-13-5-1-6-14-28/h1-20H,21-27H2
 OLNJFXJBWKTHPP-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 O=C(c1ccccc1)OCC1(CCN(CC1)CCc1ccccc1)N(C(=O)c1ccccc1)c1ccccc1