185 ATOM C1 O17 C2 C2' C3 C4 C5 C6 C6' C13 ATOM N12 C11 N5 N16 C15 C18 C14 C21 C22 C23 ATOM C24 C25 C26 C27 N27 C4' N4' O18 BR CONNECT - C1 O17 C13 N12 C11 N5 C21 C22 C23 C24 C25 C26 + CONNECT C1 C2 C2' CONNECT C1 C6 C5 C4 C3 C2 CONNECT C4 C4' N4' CONNECT C6 C6' CONNECT C13 C14 C15 N16 C11 CONNECT C15 C18 O18 CONNECT C14 BR CONNECT C21 C26 CONNECT C24 C27 N27