{4-[[3-(4-{4-[Bis-(2-chloro-ethyl)-amino]-phenyl}-butyrylamino)-propyl]-(3-tert-butoxycarbonylamino-propyl)-amino]-butyl}-carbamic acid tert-butyl ester
N-(3-aminopropyl)-1,4-diaminobutane
chlorambucil chloride
N1,N8-bis(tert-butoxycarbonyl)spermidine
{4-[(3-Amino-propyl)-(3-tert-butoxycarbonylamino-propyl)-amino]-butyl}-carbamic acid tert-butyl ester