Indigo.loadMolecule("ARS")
indigo = Indigo()
indigo.setOption("ignore-stereochemistry-errors", True)
indigo.setOption("standardize-keep-largest", True)
indigo.setOption("standardize-charges", False)
indigo.setOption("standardize-stereo", True)
indigo.setOption("standardize-neutralize-zwitterions", True)
indigo.setOption("standardize-clear-unusual-valences", True)