glycoaldehyde (H2O)      C2H4O2 + 1 x H2O = C2 H6 O3
c
c  parent species
c
  1  -2
  3  -1
 5616.601150       0.000919
 3483.428950       0.000990
 2285.792500       0.000566
78.0316934  
c
c  O(1)
c
 5610.984100      0.002200
 3266.822600      0.001100
 2191.169200      0.001000
2.0042464
end


H2O = 2 * 1.00782503207 + 15.9949146221 = 18.0105646