glycoaldehyde (H2O)_4    C2H4O2 + 4 x H2O = C2 H12 O6
c
c  parent species
c
  1  -2
  3  -1
1297.802230        0.000720
 969.157910        0.000530
 826.206530        0.000460
132.0633872
c
c  O(1)
c
1266.397240        0.000820
 963.957490        0.000820
 813.729270        0.000550
2.0042464
c
c  O(2)
c
1294.111400        0.001000
 938.592880        0.000660
 802.633070        0.000770
2.0042464
c
c  O(3)
c
1279.653210        0.000910
 957.529000        0.000870
 814.887560        0.000510
2.0042464
c
c  O(4)
c
1251.594980        0.000730
 964.719690        0.000640
 810.223910        0.000490
2.0042464
end


H2O = 2 * 1.00782503207 + 15.9949146221 = 18.0105646