7 7 0 0000 0 0 0 0 0999 V2000 0.4102 -2.0421 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 1.7378 -2.0421 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 2.1568 -0.7807 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 3.4227 -0.3705 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 4.4107 -1.2659 0.0000 O 0 0 0 0 0 0 0 0 0 0 0 1.0718 0.0000 0.0000 O 0 0 0 0 0 0 0 0 0 0 0 0.0000 -0.7807 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 1 2 1 0 1 7 2 0 2 3 2 0 3 4 1 0 3 6 1 0 4 5 2 0 6 7 1 0 M END > InChI=1S/C5H4O2/c6-4-5-2-1-3-7-5/h1-4H > HYBBIBNJHNGZAN-UHFFFAOYSA-N > 1/0/N:1,2,7,4,3,5,6/rA:7nCCCCOOC/rB:s1;d2;s3;d4;s3;d1s6;/rC:.4102,-2.0421,0;1.7378,-2.0421,0;2.1568,-.7807,0;3.4227,-.3705,0;4.4107,-1.2659,0;1.0718,0,0;0,-.7807,0; > C5 H4 O2 > 96.08406 > C1=COC(C=O)=C1 > 13863629 $$$$