.beta.-(Hydroxymethoxy) tricarballylic acid, .gamma.-lactone 1,2,3-Propanetricarboxylic acid, 2-(hydroxymethoxy)-, .gamma.-lactone 1,3-Dioxolane-4,4-diacetic acid, 5-oxo- 144-16-1 2-(Hydroxymethoxy)-1,2,3-propanetricarboxylic acid, .gamma.-lactone Anhydromethylenecitric acid NSC68614