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We present a method for the simultaneous observation of heteronuclearmulti-quantum coherences (up to the 3rd order), which give an additional degreeof freedom for ultralow magnetic field (ULF) MR experiments, where the chemicalshift is negligible. The nonequilibrium spin state is generated by SignalAmplification By Reversible Exchange (SABRE) and detected at ULF withSQUID-based NMR. We compare the results obtained by the heteronuclei CorrelatedSpectroscopY (COSY) with a Flip Angle FOurier Series (FAFOS) method. COSYallows a quantitative analysis of homo- and heteronuclei quantum coherences.

Simultaneous observation of high order multiple quantum coherences at ultralow magnetic fields