RESIDUE ACN 10 CONECT C 3 C1 C2 O CONECT O 1 C CONECT C1 4 C 1H1 2H1 3H1 CONECT C2 4 C 1H2 2H2 3H2 CONECT 1H1 1 C1 CONECT 2H1 1 C1 CONECT 3H1 1 C1 CONECT 1H2 1 C2 CONECT 2H2 1 C2 CONECT 3H2 1 C2 END HET ACN 10 HETNAM ACN ACETONE FORMUL ACN C3 H6 O1