Showing structure for 5,15-dihydroxy-6,16-disulfanyl-21,22-dithia-3,13-diazahexacyclo[9.9.2.0¹,¹³.0³,¹¹.0⁴,⁹.0¹⁴,¹⁹]docosane-2,8,12,18-tetrone