4-Aminotetrahydro-2H-thiopyran 1,1-dioxide hydrochloride116529-31-832 % similar 1,1-Dioxo-tetrahydro-thiopyran-4-one17396-35-932 % similar 1,1′-Sulfonylbis[butane]598-04-932 % similar Thiomorpholine 1,1-dioxide hydrochloride59801-62-631 % similar