RESIDUE 6OL 9 CONECT C1 4 AS H1 H2 H3 CONECT AS 3 C1 O2 O1 CONECT H1 1 C1 CONECT H2 1 C1 CONECT H3 1 C1 CONECT O2 2 AS H4 CONECT O1 2 AS H5 CONECT H4 1 O2 CONECT H5 1 O1 END HET 6OL 9 HETNAM 6OL methylarsonous acid FORMUL 6OL C1 H5 As1 O2