diff --git a/example/example.org b/example/example.org
index 8e95eec..cf317b0 100644
--- a/example/example.org
+++ b/example/example.org
@@ -467,6 +467,26 @@ tab
    [[file:dots/examplehsuRqc.svg]]
    :END:
 
+** Reaction systems
+   :PROPERTIES:
+   :header-args:racket: :prologue "#lang racket\n(require graph (file \"~/Candies/prj/racket/dds/rs.rkt\") (file \"~/Candies/prj/racket/dds/utils.rkt\"))"
+   :END:
+   Consider the following reaction system:
+   #+NAME: rs1
+   | a | x t | y | z |
+   | b | x   | q | z |
+
+   Here is how we read this reaction into Racket code:
+
+   #+BEGIN_SRC racket :results output drawer :var input-rs=munch-table(rs1)
+(unorg-rs input-rs)
+   #+END_SRC
+
+   #+RESULTS:
+   :RESULTS:
+   (hash 'a (reaction (set 'x 't) (set 'y) (set 'z)) 'b (reaction (set 'x) (set 'q) (set 'z)))
+   :END:
+
 
 * Local Variables                                                  :noexport:
   # Local Variables:
diff --git a/rs.rkt b/rs.rkt
index 8075ac7..b6c573b 100644
--- a/rs.rkt
+++ b/rs.rkt
@@ -14,7 +14,9 @@
  ;; Type names
  Species ReactionSystem
  ;; Functions
- enabled? list-enabled union-products apply-rs ht-str-triples->rs)
+ enabled? list-enabled union-products apply-rs ht-str-triples->rs
+ ;; Syntax
+ unorg-rs)
 
 ;;; =================
 ;;; Basic definitions
@@ -95,3 +97,6 @@
   (for/hash : ReactionSystem
       ([(a triple) (in-hash ht)])
     (values a (str-triple->reaction triple))))
+
+;;; Chains ht-str-triples->rs with unorg.
+(define (unorg-rs str) (ht-str-triples->rs (unorg str)))