(language.smarts.parser:parse "OCCCCC" 'list)
-->
(:CHAIN
 (:ELEMENT
  (((:ATOM NIL :KIND :ORGANIC :SYMBOL "O" :BOUNDS (0 . 1)))
   ((:BOND (:ATOM (((:ATOM NIL :KIND :ORGANIC :SYMBOL "C" :BOUNDS (1 . 2)))))
     :KIND :SINGLE :BOUNDS (1 . 2)))
   ((:BOND (:ATOM (((:ATOM NIL :KIND :ORGANIC :SYMBOL "C" :BOUNDS (2 . 3)))))
     :KIND :SINGLE :BOUNDS (2 . 3)))
   ((:BOND (:ATOM (((:ATOM NIL :KIND :ORGANIC :SYMBOL "C" :BOUNDS (3 . 4)))))
     :KIND :SINGLE :BOUNDS (3 . 4)))
   ((:BOND (:ATOM (((:ATOM NIL :KIND :ORGANIC :SYMBOL "C" :BOUNDS (4 . 5)))))
     :KIND :SINGLE :BOUNDS (4 . 5)))
   ((:BOND (:ATOM (((:ATOM NIL :KIND :ORGANIC :SYMBOL "C" :BOUNDS (5 . 6)))))
     :KIND :SINGLE :BOUNDS (5 . 6))))))