[Contribution to the analysis of mixtures of vitamins B12 and B1].
D006801:Humans; D013831:Thiamine / Q000737:chemistry*; D014805:Vitamin B 12 / Q000737:chemistry*; D014815:Vitamins
D014815:Vitamins; D014805:Vitamin B 12; D013831:Thiamine
VITAMIN B 1/chemistry; VITAMIN B 12/chemistry