Fragment:

Formula: C16O4

Mass offset: 0.229

Num. used hydrogen atoms: 13

Num. of extra required hydrogen atoms: 1

Atom indices: C1,C2,C3,C4,C5,C6,C7,C8,C9,C10,C11,C12,C13,C14,C15,C16,O17,O18,O20,O21

	Computational Annotation of MS Peaks (CAMP)
Home Processed databases Atom-Mass pairs Search: (Search for compound name or MassBank ID)	Queried mass: 269.0426 Fragment: Formula: C16O4 Mass offset: 0.229 Num. used hydrogen atoms: 13 Num. of extra required hydrogen atoms: 1 Atom indices: C1,C2,C3,C4,C5,C6,C7,C8,C9,C10,C11,C12,C13,C14,C15,C16,O17,O18,O20,O21 Heavy atoms of the fragment are shown in cyan.