P    #regions in PPM
# 2011-07-15 11:54:13 -0500  mfjofre@watusi.nmrfam.wisc.edu
# low field   high field   mi   maxi
  3.892019414149143  3.6135268588964213  18.051  108.619  # for region 1
  3.3384724833381783  2.925890920000813  16.495  109.864  # for region 2
  2.003582537560114  1.7632213076900058  5.135  61.157  # for region 3
  1.6979804024395482  1.4696372340629456  2.957  45.128  # for region 4