in chloroform addn. of Sb-compd. to suspn. of azide, refluxing (24 h, pptn.); sepn. of ppt., filtration, distn. of solvent, recrystn. (petroleum ether); elem. anal.;

in chloroform addn. of Sb-compd. to suspn. of azide, refluxing (24 h, pptn.); sepn. of ppt., filtration, distn. of solvent, recrystn. (petroleum ether);

in chloroform addn. of Sb-compd. to suspn. of azide, refluxing (24 h, pptn.); sepn. of ppt., filtration, distn. of solvent, recrystn. (petroleum ether);