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  2. (3a'R,5S,7a'R)-2',2'-dimethyl-2,7'-dioxotetrahydrospiro[oxazolidine-5,6'-[1,3]dioxolo[4,5-c]pyran]-2,7'(4'H)-dione
(3a'R,5S,7a'R)-2',2'-dimethyl-2,7'-dioxotetrahydrospiro[oxazolidine-5,6'-[1,3]dioxolo[4,5-c]pyran]-2,7'(4'H)-dione

(3a'R,5S,7a'R)-2',2'-dimethyl-2,7'-dioxotetrahydrospiro[oxazolidine-5,6'-[1,3]dioxolo[4,5-c]pyran]-2,7'(4'H)-dione

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