4-boronophenylalanine [ p-BPA cpd,4-boronophenylalanine hydrochloride,4-boronophenylalanine hydrochloride, (10)B,4-boronophenylalanine, (10)B,p-BPA compound,p-boronophenylalanine,para-borono-L-phenylalanine,para-boronophenylalanine ] neutron absorbing (10)B-cpd used in thermal neutron capturetherapy of malignant melanoma; RN given refers to (L)-isomer; structure given in first source