Modelle 001, TS-inhibition in Colorectal Liver Metastases Comparing Arfolitixorin and Calciumfolinate

A study that is blinded to the patient and the investigator where the combination of Arfolitixorin + 5-FU is compared to Calciumfolinate + 5-FU. The patients will be randomised and will receive the above described combination as IV bolus injections, peroperatively in conjuction with collection of the first tissue sample.
A low dose (30 mg) and a high dose (120) mg of Arfolitixorin will be used in order to investigate the relation between dose of Arfolitixorin and TS-inhibition.