<gh_stars>0
import pulsar as psr
def load_ref_system():
    """ Returns alpha-d-allopyranose as found in the IQMol fragment library.
        All credit to https://github.com/nutjunkie/IQmol
    """
    return psr.make_system("""
        C      1.4232      1.1866      0.0499
        C      1.7257     -0.1490      0.7850
        C      0.5858     -1.1960      0.7164
        C     -0.8136     -0.5454      0.7964
        C     -0.9219      0.6284     -0.2003
        C     -2.2589      1.3768     -0.1024
        O     -3.3109      0.4888     -0.5096
        O      0.0643      1.6200      0.1681
        O     -1.6981     -1.6025      0.4040
        O      0.7487     -1.8623     -0.5401
        O      2.9158     -0.6970      0.2550
        O      1.7026      0.9675     -1.3192
        H     -0.7080      0.2756     -1.2365
        H      1.9831      2.0587      0.4485
        H      1.9846      0.0696      1.8498
        H      0.7116     -1.9644      1.5148
        H     -1.0618     -0.2326      1.8332
        H      1.5534      1.7800     -1.8466
        H      2.7471     -1.0060     -0.6843
        H     -2.5257      1.6352      0.9410
        H     -2.2594      2.2961     -0.7125
        H     -2.6107     -1.2307      0.2269
        H     -0.0792     -2.3697     -0.7486
        H     -3.3372      0.4117     -1.4885
        """)

import pulsar as psr
def load_ref_system():
    """ Returns alpha-d-allopyranose as found in the IQMol fragment library.
        All credit to https://github.com/nutjunkie/IQmol
    """
    return psr.make_system("""
        C      1.4232      1.1866      0.0499
        C      1.7257     -0.1490      0.7850
        C      0.5858     -1.1960      0.7164
        C     -0.8136     -0.5454      0.7964
        C     -0.9219      0.6284     -0.2003
        C     -2.2589      1.3768     -0.1024
        O     -3.3109      0.4888     -0.5096
        O      0.0643      1.6200      0.1681
        O     -1.6981     -1.6025      0.4040
        O      0.7487     -1.8623     -0.5401
        O      2.9158     -0.6970      0.2550
        O      1.7026      0.9675     -1.3192
        H     -0.7080      0.2756     -1.2365
        H      1.9831      2.0587      0.4485
        H      1.9846      0.0696      1.8498
        H      0.7116     -1.9644      1.5148
        H     -1.0618     -0.2326      1.8332
        H      1.5534      1.7800     -1.8466
        H      2.7471     -1.0060     -0.6843
        H     -2.5257      1.6352      0.9410
        H     -2.2594      2.2961     -0.7125
        H     -2.6107     -1.2307      0.2269
        H     -0.0792     -2.3697     -0.7486
        H     -3.3372      0.4117     -1.4885
        """)
Returns alpha-d-allopyranose as found in the IQMol fragment library.         All credit to https://github.com/nutjunkie/IQmol C      1.4232      1.1866      0.0499         C      1.7257     -0.1490      0.7850         C      0.5858     -1.1960      0.7164         C     -0.8136     -0.5454      0.7964         C     -0.9219      0.6284     -0.2003         C     -2.2589      1.3768     -0.1024         O     -3.3109      0.4888     -0.5096         O      0.0643      1.6200      0.1681         O     -1.6981     -1.6025      0.4040         O      0.7487     -1.8623     -0.5401         O      2.9158     -0.6970      0.2550         O      1.7026      0.9675     -1.3192         H     -0.7080      0.2756     -1.2365         H      1.9831      2.0587      0.4485         H      1.9846      0.0696      1.8498         H      0.7116     -1.9644      1.5148         H     -1.0618     -0.2326      1.8332         H      1.5534      1.7800     -1.8466         H      2.7471     -1.0060     -0.6843         H     -2.5257      1.6352      0.9410         H     -2.2594      2.2961     -0.7125         H     -2.6107     -1.2307      0.2269         H     -0.0792     -2.3697     -0.7486         H     -3.3372      0.4117     -1.4885