MGR
ATOM  C1   C2   C3   C4   C5   C6   C7   C8   C9   C10
ATOM  C11  C12  C13  C14  C15  C16  C17  C18  C19  C22
ATOM  C23  C24  C25  N2   N3 
CONNECT -  C1   C2  C3  C4  C5  C6  C7  C2 +
CONNECT  C1   C8  C9  C10  C11  C12  C13  C8
CONNECT  C1   C14  C15  C16  C17  C18  C19  C14
CONNECT  C11  N2  C22
CONNECT  C17  N3  C24
CONNECT  C23  N2
CONNECT  C25  N3