1,6,11,16-Tetraazacycloeicosane-2,5,12,15-tetrone,1,8,11,18-tetrahydroxy-, [8S-(8R*,18R*)]-;1,8(S),11,18(S)-Tetrahydroxy-1,6,11,16-tetraazacycloeicosane-2,5,12,15-tetrone;Alcaligin
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