You searched for a fragment C18H11O3 in MassBank data.
- Page KO009201p → C18H11O3: C17H11O2 C9H9O2 C8H7O
- Page KOX00658p → C18H11O3: C15H9*** C9H9O2*** C8H7O*** C7H7***
- Page KOX00836p → C18H11O3: C17H11O2*** C16H11O2*** C9H9O3*** C9H9O2*** C8H7O2*** C8H7O*** C7H7O*** C7H7***
