Pill Identification by Imprints: RI91 Home Pill Identification by Imprints: RI91 2 results MINOCYCLINE HCL 100 MG TABLET Side 1: RI91 Color: Yellow Side 2: Shape: Oval MINOCYCLINE HCL 100 MG TABLET Side 1: RI91 Color: Yellow Side 2: Shape: Oval Other Popular Drug Imprint SCI B 543 517 A CL V401 540 SZ 213 45 W 112 Estradiol 0.075 mg/day CP113 MP 511 M 313 SZ 431 S MP 271 MYLAN TM 20 54 421 M U12 44-329 MAXALT N 740 logo SANDOZ 667 M T11 522 851 GG N6 93 3145 B-635 A10 ZF 14 348 25 EC-NAPROSYN logo and 13 CL 56 MSD 106 BCI 66 or 67 ENA