Complex sentence: It is an oxide of carbon (an oxocarbon), which can be viewed as the fourfold ketone of dioxane, or as the cyclic dimer of oxiranedione (C 2 O 3), the hypothetical anhydride of oxalic acid.
Split into simpler sentences: It is an oxide of carbon (an oxocarbon), which can be viewed as the fourfold ketone of dioxane. It canbe viewed also as the cyclic dimer of oxiranedione (C 2 O 3), the hypothetical anhydride of oxalic acid.