PQC;ESTER OF 2-DIAZO-1-NAPHTHOL-4-SULFONE WITH 4-CRESOL RESIN;Cresol-formaldehyde copolymer 1,2-naphthoquinonediazido-4-sulfonate;Cresol-formaldehyde copolymer 3-diazo-3,4-dihydro-4-oxo-1-naphthalenesulfonate;Formaldehyde polymer with methylphenol, 3-diazo-3,4-dihydro-4-oxo-1-naphthalenesulfonate