\documentclass{article}
\usepackage[utf8x]{inputenc}
\usepackage{xymtex}
\usepackage{graphicx}
\pagestyle{empty}
\begin{document}
\begin{picture}(5000,1500)(0,0)
	\let\substfont=\sffamily
	\let\substfontsize=\footnotesize
	\changeunitlength{0.08pt}
	% main chain	
	\put(-220,-20){\Utrigonal{0==O;2==;3==}}
	\put(0,0){\pyranose{2Sb=={O-Ac};3Sb==OH;5Sb==CH$_2$OH}}
	\put(660,220){\Dtrigonal{0==O;2==;3==}}
	\put(880,0){\sixsugarh{2==O;}{3Sa=={CH$_2$OH};6Sb==OH;5Sa==OH;1Sb==OH}}
	\put(1540,-20){\Utrigonal{0==O;2==;3==}}
	\put(1760,0){\pyranose{2Sb==OH;3Sb==OH;5Sb==CH$_2$}}
	\put(2420,220){\Dtrigonal{0==O;2==;3==}}
	\put(2640,0){\sixsugarh{2==O;}{3Sa=={CH$_2$OH};6Sa==OH;5Sa=={O-Ac}}}
	\put(3320,-20){\Utrigonal{0==O;2==;3==}}
	\put(3540,0){\pyranose{2Sa==OH;3Sb==OH;5Sb==CH$_2$OH}}
	\put(4200,220){\Dtrigonal{0==O;2==;3==}}
	\put(4420,0){\sixsugarh{2==O;}{3Sa=={CH$_2$OH};6Sb==OH;5Sa==OH}}
	\put(5080,-20){\Utrigonal{0==O;2==;3==}}
	% side chain 
	\put(1820,670){\Utrigonal{0==O;1==;3==}}
	\put(1150,700){\pyranose{2Sa==OH;3Sb==OH;4Sb==OH;5Sb==CH$_2$OH}}
\end{picture}
\end{document}