You searched for a fragment C21H17O7 in MassBank data.
- Page KO008924p → C21H17O7: C21H15O6 C19H13O5
- Page KOX00715p → C21H17O7: C21H15O6 C19H13O5** C6H9O2*
- Page PR100251p → C21H17O7: C20H15O6*** C19H13O5*** C19H15O4*** C17H13O5*** C16H12O4*** C16H11O4*** C15H11O3***
