Synonyms: Circulin B(7CI,8CI); 1,4,7,10,13,16,19-Heptaazacyclotricosane, cyclic peptide deriv.;L-Threonine, Na-(6-methyl-1-oxoheptyl)-L-a,g-diaminobutyryl-L-threonyl-L-a,g-diaminobutyryl-L-a,g-diaminobutyryl-L-a,g-diaminobutyryl-D-leucyl-L-isoleucyl-L-a,g-diaminobutyryl-L-a,g-diaminobutyryl-, cyclic (10®4)-peptide; Na-(6-Methyl-1-oxoheptyl)-L-a,g-diaminobutyryl-L-threonyl-L-a,g-diaminobutyryl-L-a,g-diaminobutyryl-L-a,g-diaminobutyryl-D-leucyl-L-isoleucyl-L-a,g-diaminobutyryl-L-a,g-diaminobutyryl-L-threonine cyclic (10®4)-peptide