Synonyms: 2-Piperidinone,1-(6,7-dihydro-6-hydroxy-5,5-dimethyl-2-nitro-5H-thieno[3,2-b]pyran-7-yl)-,trans-(?à)-; 5H-Thieno[3,2-b]pyran,2-piperidinone deriv.; 2-Piperidinone,1-(6,7-dihydro-6-hydroxy-5,5-dimethyl-2-nitro-5H-thieno[3,2-b]pyran-7-yl)-,trans-; RWJ 26629