13C3-Caffeine, 10mg Back Catalog number: 680424 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 11319.13-K-ME Melatonin,1000 µg/mL,MeOH,1mL, Price on request 676571 Methiocarb-sulfone, 50mg Price on request 681811 Pyriofenone, 100 µg/ml, Acetonitrile, 1ml Price on request