16709-50-5 2,9-Benzodioxacyclododecin-1,10-dione, 3,4,5,6,7,8-hexahydro- 3,4,5,6,7,8-Hexahydrobenzo-2,9-dioxacyclododecin-1,10-dione EINECS 240-757-6 Phthalic acid, cyclic hexamethylene ester