. . . . . . . "Spiruchostatin" . "Spiruchostatin" . . . . . . "(1S,4R,8S,12S,13R,21E)-12-Hydroxy-4-methyl-13-(propan-2-yl)-9-oxa-17,18-dithia-2,5,14-triazabicyclo[7.7.6]docos-21-ene-3,6,10,15-tetrone" . . . .