enzoyl arginine ethyl ester苯甲酰精氨酸乙酯 benzylarginine ethyl ester苄精氨酸乙酯 n-benzoyl-l-arginine ethyl estern-苯甲酰(基)-l-精氨酸乙酯 n-benzoyl-l-arginine ethyl ethern-苯甲酰(基)-l-精氨酸乙醚