why does A2-B3 structure is active (contain the antibiotic) and the (A2- B2,A1-B1,A1-B2,A1-B3,A3-B1,A3-B2,A3- B3) are nonactive help please! atoriai pioccum below. A1 A2 A3 *N=0 2-nitrobenzaldehyde 5-nitro-2-furaldehyde 3-nitrobenzaldehyde B1 B2 NH₂ HN. 4-bromophenylhydrazine hydrochloride NH₂ B3 Br HN. -CEN 4-cyanophenylhydrazine hydrochloride NH₂ HN CẠNH NH₂ aminoguanidine bicarbonate

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