A novel diamine monomer 2H-(4-aminophenyl)-4-[4-(4-aminophenoxy) biphenyl]-phthalazinone 1 containing aza hetero cycle was synthesized and utilized for preparat
Two new cyclopeptides, leiocyclocin A (1), B (2), were isolated from the seeds of Goniothalamus leiocarpus. Their structures were elucidated by means of spectra