4-[(aRaS)-1-methylpiperidin-4-ylidene]-4,9-dihydro-10H-benzo[4,5]cyclohepta[1,2-b]thiophen-10-one N-oxide;4,9-Dihydro-4-(1-methyl-1-oxido-4-piperidinylidene)-10H-benzo[4,5]cyclohepta[1,2-b]thiophen-10-one;