3IL
ATOM  N1   C2   C3   C4   C5   C6   C7   C8   C9   C10
ATOM  O11  O12  C13  O14  C15
CONNECT -  N1   C2  C3  C9  C4  C5  C6  C7  C8  N1 +
CONNECT  C3   C15  C13  C10  O11
CONNECT  C8   C9
CONNECT  C10  O12
CONNECT  C13  O14