W1,3-Bisphosphoglyceric acid
WButyryl phosphate
WCarbamoyl phosphate
WCarbon dioxide
WDichlorine heptoxide
WDichlorine pentoxide
WDinitrogen pentoxide
WDinitrogen trioxide
WDisulfuric acid
WManganese heptoxide
WMethanesulfonic anhydride
WNitrosylsulfuric acid
WOrganic acid anhydride
WPhosphorus pentoxide
WPyrophosphoric acid
WRubratoxin
WTrifluoromethanesulfonic anhydride