import pulsar as psr
def load_ref_system():
    """ Returns l-glutamic_acid as found in the IQMol fragment library.
        All credit to https://github.com/nutjunkie/IQmol
    """
    return psr.make_system("""
        N      0.1209     -2.2995     -0.2021
        C      0.4083     -0.9510     -0.7668
        C     -0.0197      0.1567      0.2036
        H      0.2953     -0.0889      1.2387
        H      0.5152      1.0936     -0.0551
        C     -1.5226      0.3991      0.1502
        H     -1.8462      0.6291     -0.8851
        H     -2.0847     -0.5077      0.4535
        C     -1.8924      1.5597      1.0413
        O     -1.8774      2.7496      0.7858
        O     -2.3012      1.2232      2.2867
        H     -2.5017      2.0069      2.7891
        C      1.9123     -0.8901     -1.0205
        O      2.3094     -1.5372     -2.1437
        O      2.7925     -0.3483     -0.3817
        H      0.2282     -2.9904     -0.9133
        H     -0.8129     -2.3188      0.1500
        H     -0.1109     -0.7851     -1.7497
        H      3.2561     -1.4867     -2.2319
        """)