C16H18O9

The molecular formula C16H18O9 may refer to:


 * Chlorogenic acid (3-O-caffeoylquinic acid or 3-CQA)
 * Cryptochlorogenic acid (4-O-caffeoylquinic acid or 4-CGA)
 * Neochlorogenic acid (5-O-caffeoylquinic acid or 5-CQA)
 * Scopolin