b-Alaninamide,cis-4-methyl-1-(4-methyl-1-oxo-2-hexenyl)-L-prolyl-[threo-(E)]-6,7-didehydro-4-methyl-8-oxo-L-2-aminodecanoyl-threo-3-(acetyloxy)-L-leucyl-2-methylalanyl-L-leucyl-L-leucyl-2-methylalanyl-2-methylalanyl-N-[2-(dimethylamino)-1-methylethyl]-,[1