data_try_loop_with_single_quotes

    loop_
    _item_units_conversion.from_code
    _item_units_conversion.to_code
    _item_units_conversion.operator
    _item_units_conversion.factor
###
     "centimetres"              "millimetres"              "*"   1.0E+01
     "centimetres"              "nanometres"               "*"   1.0E+07
     "centimetres"              "angstroms"                "*"   1.0E+08
     "centimetres"              "picometres"               "*"   1.0E+10
     "centimetres"              "femtometres"              "*"   1.0E+13
#
     "millimetres"              "centimetres"              "*"   1.0E-01
     "millimetres"              "nanometres"               "*"   1.0E+06
     "millimetres"              "angstroms"                "*"   1.0E+07
     "millimetres"              "picometres"               "*"   1.0E+09
     "millimetres"              "femtometres"              "*"   1.0E+12
#
     "nanometres"               "centimetres"              "*"   1.0E-07
     "nanometres"               "millimetres"              "*"   1.0E-06
     "nanometres"               "angstroms"                "*"   1.0E+01
     "nanometres"               "picometres"               "*"   1.0E+03
     "nanometres"               "femtometres"              "*"   1.0E+06
#
###
     "celsius"                  "kelvins"                  "-"     273.0
     "kelvins"                  "celsius"                  "+"     273.0
###
     "electrons_per_nanometres_cubed"
     "electrons_per_angstroms_cubed"                       "*"   1.0E+03
     "electrons_per_nanometres_cubed"
     "electrons_per_picometres_cubed"                      "*"   1.0E+09
#
     "electrons_per_angstroms_cubed"
     "electrons_per_nanometres_cubed"                      "*"   1.0E-03
     "electrons_per_angstroms_cubed"
     "electrons_per_picometres_cubed"                      "*"   1.0E+06
#
     "electrons_per_picometres_cubed"
     "electrons_per_nanometres_cubed"                      "*"   1.0E-09

#...
#
