\chemfig{ \mcfleft{\mcfatomno{3}}{O}% 3 >:[:60.2]\mcfatomno{14}% 14 ( -[:180.2]\mcfatomno{25}% 25 ( -[:240.2]\mcfatomno{30}% 30 -[:180.2]\mcfleft{\mcfatomno{8}}{O}% 8 ) =[:120.2]\mcfleft{\mcfatomno{7}}{O}% 7 ) -[:90,1.042]\mcfatomno{15}% 15 -[:29.6,1.042]\mcfatomno{13}% 13 ( <:[:89.3]\mcfright{O}{\mcfatomno{1}}% 1 >:[:149.3]\mcfatomno{19}% 19 -[:209.3]\mcfbelow{O}{\mcfatomno{2}}% 2 -[:149.3]\mcfatomno{23}% 23 ( <[:209.3]\mcfatomno{29}% 29 ) -[:89.3]\mcfatomno{22}% 22 ( -[:29.3]\mcfatomno{21}% 21 ( -[:329.3]\mcfatomno{20}% 20 -[:269.3]\phantom{19}% -> 19 ) <[:89.3]\mcfright{N}{\mcfatomno{12}}% 12 ) <[:149.3]\mcfleft{\mcfatomno{4}}{O}% 4 ) -[:329.1,1.042]\mcfatomno{17}% 17 -[:270]\mcfatomno{18}% 18 ( -[:210.9,1.042]\mcfatomno{16}% 16 -[:150.4,1.042]\phantom{14}% -> 14 ) =^[:330]\mcfatomno{26}% 26 ( -[:270]\mcfright{O}{\mcfatomno{6}}% 6 ) -[:30]\mcfatomno{28}% 28 =^[:90]\mcfatomno{27}% 27 ( -[:150]\mcfatomno{24}% 24 ( =^[:210]\phantom{17}% -> 17 ) -[:90]\mcfright{O}{\mcfatomno{5}}% 5 ) -[:30.9,1.042]\mcfatomno{31}% 31 ( =[:90.7]\mcfright{O}{\mcfatomno{9}}% 9 ) -[:330.4,1.042]\mcfatomno{33}% 33 =^[:270,1.042]\mcfatomno{34}% 34 ( -[:209.6,1.042]\mcfatomno{32}% 32 ( -[:149.1,1.042]\phantom{28}% -> 28 ) =[:269.3]\mcfright{O}{\mcfatomno{10}}% 10 ) -[:329.1,1.085]\mcfatomno{36}% 36 =^[:29.6,1.085]\mcfatomno{38}% 38 -[:90,1.085]\mcfatomno{37}% 37 =^[:150.4,1.085]\mcfatomno{35}% 35 ( -[:210.9,1.085]\phantom{33}% -> 33 ) -[:90.7]\mcfleft{\mcfatomno{11}}{O}% 11 -[:30.7]\mcfatomno{39}% 39 }