RESIDUE XIE 13 CONECT N 2 C4 C5 CONECT C 3 C1 H1 O1 CONECT C1 3 C C2 C5 CONECT C2 3 C1 C3 H4 CONECT C3 3 C2 C4 H5 CONECT C4 3 N C3 H6 CONECT C5 3 N C1 H7 CONECT H1 1 C CONECT H4 1 C2 CONECT H5 1 C3 CONECT H6 1 C4 CONECT H7 1 C5 CONECT O1 1 C END HET XIE 13 HETSYN XIE NICOTINALDEHYDE HETNAM XIE Nicotinaldehyde FORMUL XIE C6 H5 N O