(2,2,3,3,4,4,5,5,6,6,7,7,7-Tridecafluoroheptyl)oxirane 38565-52-5 EINECS 254-004-4 Oxirane, (2,2,3,3,4,4,5,5,6,6,7,7,7-tridecafluoroheptyl)-