	Computational Annotation of MS Peaks (CAMP)
Home Processed databases Atom-Mass pairs Search: (Search for compound name or MassBank ID)	Queried mass: 54.9 Fragment: Formula: C2O2 Mass offset: 0.112 Num. used hydrogen atoms: 1 Num. of extra required hydrogen atoms: 0 Atom indices: C2,C4,O7,O8 Heavy atoms of the fragment are shown in cyan.