. . . . "4,4\u2032-Methylenebis(3-hydroxy-2-naphthoic acid)" . "4,4\u2032-Methylenebis(3-hydroxynaphthalene-2-carboxylic acid)" . . . . . . . . . "Pamoic acid" . . . . "Embonic acid" . "pamoic acid" . . . . . . "Pamoic acid" . . . .