Cerium (Ce)

1,2,3,4,6,7,8-Heptachloro[13C12]dibenzofuran, 1.2ml x 50ug/ml, toluene

Tm/Ts Mixture Tm – 0615,27 17alpha(H)-22,29,30-Trisnorhopane Ts – 2635,27 18alpha(H)-22,29,30-Trisnorneohopane With a spesific ratio between the two peaks based on a SIM spectra of ion m/z = 191

2-Methoxy-3,5-dimethylpyrazine, 10mg