def map_SWAS_var2GEOS_var(var, invert=False):
    """
    Map variables names from SWAS to GEOS variable names
    """
    d = {
        #    '1_3_butadiene':,
        #    '1_butene':,
        #    '2_3_methylpentane':,
        #    '224_tmp':,
        'acetaldehyde': 'ALD2',
        'acetone': 'ACET',
        #    'acetylene':,
        'benzene': 'BENZ',  # GEOSChem, but not GEOS-CF output
        #    'benzenechb':,
        'cis_2_butene': 'PRPE',  # NOTE: lumped tracer for >= C3 alkenes
        'cyclo_pentane': 'ALK4',  # NOTE: lumped tracer for >= C4 Alkanes
        'dms': 'DMS',  # GEOSChem, but not GEOS-CF output
        #    'dmschb':,
        'ethane': 'C2H6',
        #    'ethene':,
        #    'ethylbenzene':,
        #    'extra_1':,
        #    'extra_2':,
        #    'extra_3':,
        #    'extra_4':,
        #    'extra_5':,
        #    'extra_l2':,
        'iso_butane': 'ALK4',  # NOTE: lumped tracer for >= C4 Alkanes
        'iso_butene': 'PRPE',  # NOTE: lumped tracer for >= C3 alkenes
        'iso_pentane': 'ALK4',  # NOTE: lumped tracer for >= C4 Alkanes
        'isoprene': 'PRPE',  # NOTE: lumped tracer for >= C3 alkenes
        'methanol': 'MOH',
        'mp_xylene': 'XYLE',
        'n_butane': 'ALK4',  # NOTE: lumped tracer for >= C4 Alkanes
        'n_heptane': 'ALK4',  # NOTE: lumped tracer for >= C4 Alkanes
        'n_hexane': 'ALK4',  # NOTE: lumped tracer for >= C4 Alkanes
        'n_octane': 'ALK4',  # NOTE: lumped tracer for >= C4 Alkanes
        'n_pentane': 'ALK4',  # NOTE: lumped tracer for >= C4 Alkanes
        'o_xylene': 'XYLE',
        'pent_1_ene':  'PRPE',  # NOTE: lumped tracer for >= C3 alkenes
        'propane': 'C3H8',
        'propene': 'PRPE',  # NOTE: lumped tracer for >= C3 alkenes
        'toluene': 'TOLU',
        #    'toluenechb':,
        'trans_2_butene': 'PRPE',  # NOTE: lumped tracer for >= C3 alkenes
        'trans_2_pentene': 'PRPE',  # NOTE: lumped tracer for >= C3 alkenes
    }
    # Invert the dictionary?
    if invert:
        d = {v: k for k, v in list(d.items())}
    return d[var]