You searched for a fragment C12H19N2O2 in MassBank data.
- Page KO009126p → C12H19N2O2: C11H16N2O2 C9H13N C3H6NO
- Page KOX00667p → C12H19N2O2: C12H15N2O2* C11H15N2O2 C11H15N2O C8H10NO* C9H12N C8H7O* C7H7
- Page KOX00815p → C12H19N2O2: C11H16N2O2 C9H13NO C9H12NO C9H13N*** C3H6NO