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 98462 Amfepramone Price on request 18000-1495-100AN1 O-Desmethylvenlafaxine, 100µg/ml in AL, 1ml Price on request 79153 Octachlorostyrene Price on request