Cyclic(L-alpha,gamma-diaminobutyryl-Ngamma-(1-oxononyl)-L-alpha,gamma-diaminobutyryl-L-alpha,gamma-diaminobutyryl-D-leucyl-L-threonyl-L-alpha,gamma-diaminobutyryl-L-alpha,gamma-diaminobutyryl-L-threonyl-L-alpha,gamma-diaminobutyryl-L-threonyl), pentahydrochloride