(7R)-7-(5,6-dihydro-8H-imidazo[2,1-c][1,4]oxazin-2-yl)-6-formyl-2,7-dihydro-1,4-thiazepine-3-carboxylic acid
(7r)-7-(5,6-dihydro-8h-imidazo[2,1-c][1,4]oxazin-2-yl)-6-formyl-2,7-dihydro-1,4-thiazepine-3-carboxylic acid