title: C7H6O4
text: # C7H6O4
  
  The molecular formula $C_7H_6O_4$ may refer to:
  
  * Dihydroxybenzoic acids, a type of phenolic acids
     * 2,3-Dihydroxybenzoic acid (2-pyrocatechuic acid or hypogallic acid)
     * 2,4-Dihydroxybenzoic acid (β-resorcylic acid)
     * 2,5-Dihydroxybenzoic acid (gentisic acid)
     * 2,6-Dihydroxybenzoic acid (γ-resorcylic acid)
     * 3,4-Dihydroxybenzoic acid (protocatechuic acid)
     * 3,5-Dihydroxybenzoic acid (α-resorcylic acid)
  * Patulin, a mycotoxin produced by a variety of molds
  