InChI=1S/CH2O2/c2-1-3/h1H,(H,2,3)
AuxInfo=1/1/N:1,2,3/E:(2,3)/rA:5nCOOHH/rB:d1;s1;s1;s3;/rC:.3556,-.1121,0;.965,-1.1691,0;-.8654,-.1121,0;.8517,.7444,0;-1.3068,.649,0;