Like kriggy, it makes no sense to me that the 6-membered ring should be called epichlorohydrin carbonate, as it is not structurally related to epichlorohydrin. A quick google suggests that, as might be expected, CO2 reacts with epoxides (including epichlorohydrin) to give 1,2-carbonates. I'm sure that is what OP is doing and, if so, their "epichlorohydrin carbonate" must be the same as chloromethyl ethylene carbonate.