Dorzolamide EP Impurity A

Chemical Name: (4R,6R)-4-(ethylamino)-6-methyl-5,6-dihydro-4H-thieno[2,3-b]thiopyran-2-sulfonamide 7,7-dioxide hydrochloride (as per EP) ; (4R,6R)-4-(ethylamino)-5,6-dihydro-6-methyl-4H-thieno[2,3-b]thiopyran-2-sulfonamide-7,7-dioxide, monohydrochloride (as per USP)

Synonym: Dorzolamide USP Related Compound A ; ent-Dorzolamide ; 4R,6R-Dorzolamide

Smile: O=S(C(S1)=CC([C@H](NCC)C[C@H]2C)=C1S2(=O)=O)(N)=O