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Chemical structures of two hydrogen sulphide-releasing derivatives of naproxen (ATB-345 and ATB-346). ATB-345, 2-(6-methoxy-napthalen-2-yl)-propionic acid 4-(5-thioxo-5H-[1,2]dithiol-3-yl)-phenyl ester; ATB-346, 2-(6-methoxy-napthalen-2-yl)-propionic acid 4-thiocarbamoyl-phenyl ester.
