199734-72-0

(4R,?6R)?-?rel-4-?(Ethylamino)?-?N-?[[(4S,?6S)?-?4-?(ethylamino)?-?5,?6-?dihydro-?6-?methyl-?7,?7-?dioxido-?4H-?thieno[2,?3-?b]?thiopyran-?2-?yl]?sulfonyl]?-?5,?6-?dihydro-?6-?methyl-4H-?thieno[2,?3-?b]?thiopyran-?2-?sulfonamide-7,7-dioxide is a byproduct from in-process test for synthesis of dorzolamide hydrochloride.