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3,3-Bis(hydroxyaryl)-2-benzofuran-1(3H)-ones generally derived from the condensation of phthalic anhydride with phenols, 3,3-Bis(hüdroksü-arüül)-2-benso-furaan-1(3H)-oonid, mis tekivad ftaal-anhüdiidi kondensatsioonil fenoolidega
phthaleins . Keemiaterminite baas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//kem/phthaleins/1/eng (02.07.2026)
