You searched for a fragment C9H11O2 in MassBank data.
- Page KOX00403n → C9H11O2: C3H3O2*** C4H5O*** C2H3O2***
- Page KOX00807p → C9H11O2: C9H9O C9H7** C7H7O** C8H9** C8H7** C7H7** C6H7** C6H5** C5H5** C4H3***
- Page KOX00895p → C9H11O2: C9H10O2* C9H9O*** C8H9***
