5,5',5''-(Hydroxymethylidyne)tris(2-hydroxybenzoic acid)
5,5',5''-(Hydroxymethylidyne)tris(2-hydroxybenzoic acid) ??
??
5,5',5''-(Hydroxymethylidyne)tris(2-hydroxybenzoic acid) C??? ??, ??, ??
5,5',5''-(Hydroxymethylidyne)tris(2-hydroxybenzoic acid) ?? ?? ? ???
???
?? ??
5,5',5''-(Hydroxymethylidyne)tris(2-hydroxybenzoic acid) ?? ??
???( 0)?? ??