$\begin{array}{1 1}(A)\;C_{35}H_{62}O_5N_4Mg\\(B)\;C_{35}H_{70}O_6N_4Mg\\(C)\;C_{55}H_{72}O_5N_4Mg\\(D)\;C_{45}H_{70}O_6N_4Mg\end{array} $
