N-L-Alanyl-1-aminoethylphosphonic acid (IIIa) and N-D-alanyl-1-aminoethylphos-phonic acid (IIIb) were synthesized. IIIb did not exhibit any antibacterial activity against gram-positive or gram-negative organisms, but IIIa showed antibacterial activity against some gram-negative organisms.
                                    合成了 N-L-丙
氨酰-1-
氨乙基膦酸(IIIa)和 N-D-丙
氨酰-1-
氨乙基膦酸(IIIb)。IIIb 对革兰氏阳性或革兰氏阴性菌均无抗菌活性,但 IIIa 对某些革兰氏阴性菌具有抗菌活性。