RESIDUE BXH 19 CONECT NAD 2 NAB CAE CONECT NAB 3 NAD NAA HAB CONECT NAA 2 NAB NAC CONECT NAC 2 NAA CAE CONECT CAE 3 NAD NAC CAF CONECT CAF 4 CAE CAG HAO HAF CONECT CAG 3 CAF OAI OAH CONECT OAI 1 CAG CONECT OAH 2 CAG CAJ CONECT CAJ 4 OAH CAK HAJ HAK CONECT CAK 4 CAJ HAM HAN HAL CONECT HAB 1 NAB CONECT HAO 1 CAF CONECT HAF 1 CAF CONECT HAJ 1 CAJ CONECT HAK 1 CAJ CONECT HAM 1 CAK CONECT HAN 1 CAK CONECT HAL 1 CAK END HET BXH 19 HETNAM BXH ethyl 2-(2~{H}-1,2,3,4-tetrazol-5-yl)ethanoate FORMUL BXH C5 H8 N4 O2