Novel antibiotics and methods of using same

A compound for treating or preventing bacterial infections having the structure of formula (I):

• wherein A is N or CR7;
• R1 is hydrogen or R;
• R7 is independently hydrogen, R, or F;
• and
• R2-R6 are independently selected at each occurrence from hydrogen, —X, -L1-X, or -L1-R;
• where
• —X is independently selected at each occurrence from —CN, —NH2 or —F;
• L1 is selected independently at each occurrence from —NH—, —N(R)—, —C(O)—, —(CH2)1-4—, —C(O)—N(R)—, —(C(R)2)-3—N(R)—, or —(C(R)2)1-3—;
• R is independently selected at each occurrence from hydrogen, or C1-5 linear or branched alkyl;
• wherein at least one of R2-R4 is a group -L1-R;
• or pharmaceutically acceptable salts thereof.