2-(Bromo­phenyl­imino)-10-oxo-9-oxa-1-thia-3,4-diaza­spiro­[4.15]eicosa-3-ene

The title compound, C22H30BrN3O2S, has been synthesized from 12-oxo-1,15-penta­deca­nolactone via N-(2-bromo­phen­yl)-6-oxo-5-oxacyclo­hexa­deca­none thio­semicarbazone, followed by oxidative cyclization on treatment with mangan­ese dioxide. In the mol­ecule, all bond lengths and angles show normal values.