4-Hydroxy-8-thioxocyclohept(c)-1,2-oxathiol-3(8H)-one 89550-93-6 BRN 4415507 CB-104 CYCLOHEPT(c)-1,2-OXATHIOL-3(8H)-ONE, 4-HYDROXY-8-THIOXO- Cyclohept(c)(1,2)oxathiol-3(8H)-one, 4-hydroxy-8-thioxo- Thiotropocin