Latex-chemfig

完成一个较复杂的图形的绘制，值得记录一下，如下图

\chemfig{H_3C-[:30]?[cen]\chemmove{\draw (0,0)circle(10pt);}(-[:-30]OH)(-[:90]COOH)(-#(10pt,)[:30,1]OH)(-#(10pt,)[:150,1]OH)(-#(10pt,)[:-90,1]COOH)}