13C3-Caffeine, 100 µg/ml, Methanol, 1ml Back Catalog number: 681491 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 73381 Diethyl adipate Price on request 71549 2,2,5,5-Tetramethyltetrahydrofuran Price on request 10943.39-100-CF Phosphatidylethanol-d5 ammonium salt,100 µg free acid/mL,chloroform,1mL, Price on request