Added three additional examples

glucose.tex

@@ -0,0 +1,14 @@
+\documentclass{standalone}
+\usepackage{chemfig}
+\renewcommand*\printatom[1]{\ensuremath{\mathsf{#1}}}
+\begin{document}
+
+% \setcrambond{2pt}{}{}
+% \setatomsep{2em}
+\chemfig{
+  HO-[2,.5,2]?<[7,.7](-[2,.5]OH)-[,,,,line width=2.4pt](-[6,.5]OH)>[1,.7]
+    (-[:-65,.7]O-[:65,.7]?[b](-[2,.7]CH_2OH)<[:-60,.707](-[6,.5]OH)
+      -[,,,,line width=2.4pt](-[2,.5,,2]HO)>[:60,.707](-[6,.5]CH_2OH)-[:162,.9]O?[b])
+  -[3,.7]O-[4]?(-[2,.3]-[3,.5]HO)}
+
+\end{document}

testosterone.tex

@@ -0,0 +1,45 @@
+\documentclass{standalone}
+\usepackage{chemfig}
+\begin{document}
+\begin{math}
+\chemfig{
+           % 1
+     >[:54]% 2
+    -[:300]% 3
+          -% 4
+     >[:60]% 5
+    -[:120]% 6
+              (
+        -[:180]% 7
+                  (
+            <[:132]% 8
+            -[:204]% 9
+            -[:276]% 10
+                      (
+            <[:222,,,2]HO% 11
+                      )
+            -[:348]% -> 2
+                  )
+        -[:240]% -> 2
+              )
+    <:[:60]% 12
+          -% 13
+    -[:300]% 14
+         =_% 15
+    -[:300]% 16
+              (
+              =O% 17
+              )
+    -[:240]% 18
+    -[:180]% 19
+    -[:120]% 20
+              (
+        -[:180]% -> 5
+              )
+              (
+         -[:60]% -> 14
+              )
+    <[:240]% 21
+}\end{math}
+\end{document}
+

trees1.tex

@@ -0,0 +1,15 @@
+\documentclass[border=0.5cm]{standalone}
+\usepackage{tikz}
+\usetikzlibrary{shapes.geometric, arrows}
+\tikzstyle{block} = [rectangle, rounded corners, minimum width=3cm, minimum height=1cm,text centered, draw=red, fill=white]
+\tikzstyle{arrow} = [thick,->,>=stealth]
+\begin{document}
+\begin{tikzpicture}[node distance=2cm]
+\node (start) [block] {Start};
+\node (stop) [block, below of=start] {Stop};
+\node (other) [block, right of=stop, xshift=2cm] {Other};
+\draw [arrow] (start) -- (stop);
+\draw [arrow] (start) -- (other);
+\end{tikzpicture}
+\end{document}
+