Starting from the version 14.1 of Mnova, spectra, peak-lists and signal assignment can be exported and imported in the json format.
Use “Save as” and select the relevant (*.json) entries from the pull-down menu. Drop json files directly into the main Mnova application window to import files.
serialization.save("c:/santonin.mol", "mol"); // for JSmol
serialization.save("c:/santonin_molecule.json", "JSON Molecule (*.json)") // for the J-graph
serialization.save("c:/santonin_spectrum.json", "JSON NMR (*.json)") // for the spectrum