+-----------------+-----------------+-----------------+-----------------+
| **Molecules     |                 |                 |                 |
| with Two        |                 |                 |                 |
| Atoms**         |                 |                 |                 |
+-----------------+-----------------+-----------------+-----------------+
| CN              | CS              | CO              | C~2~            |
|                 |                 |                 |                 |
| cyanide radical | carbon          | carbon monoxide | diatomic carbon |
|                 | monosulfide     |                 |                 |
+-----------------+-----------------+-----------------+-----------------+
| CH              | NH              | OH              | S~2~            |
|                 |                 |                 |                 |
| methylidyne     | imidyl radical  | hydroxyl        | diatomic sulfur |
|                 |                 | radical         |                 |
+-----------------+-----------------+-----------------+-----------------+
| SH ?            | SO              | NS              | NO ?            |
|                 |                 |                 |                 |
| mercapto        | sulfur monoxide | nitrogen        | nitrous oxide   |
| radical         |                 | sulfide         |                 |
+-----------------+-----------------+-----------------+-----------------+
| N~2~^+^         | CO^+^           | CH^+^           | OH^+^           |
+-----------------+-----------------+-----------------+-----------------+
|                 | CN^+^           | H~2~            |                 |
+-----------------+-----------------+-----------------+-----------------+

+----------------------+-------------------------+---------------------+
| **Molecules with     |                         |                     |
| Three Atoms**        |                         |                     |
+----------------------+-------------------------+---------------------+
| H~2~O\               | HDO\                    | H~2~O^18^\          |
| water                | monodeuterated water    | oxygen-18 water     |
+----------------------+-------------------------+---------------------+
| CO~2~\               | C~3~\                   | H~2~S\              |
| carbon dioxide       | triatomic carbon        | hydrogen sulfide    |
+----------------------+-------------------------+---------------------+
| NH~2~\               | SO~2~\                  | HCN\                |
| amidogen radical     | sulfur dioxide          | hydrogen cyanide    |
+----------------------+-------------------------+---------------------+
| HNC\                 | HCO\                    | OCS\                |
| hydrogen isocyanide  | formyl radical          | carbonyl sulfide    |
+----------------------+-------------------------+---------------------+
| H~2~O^+^             | HCO^+^                  | CO~2~^+^            |
+----------------------+-------------------------+---------------------+
| H~2~S^+^             | CS~2~                   | CN~2~               |
|                      |                         |                     |
|                      | carbon disulfide        |                     |
+----------------------+-------------------------+---------------------+

  ------------- ---------------- ------------------ ------------- -------------
  **Molecules                                                     
  with Four                                                       
  Atoms**                                                         

  C~2~H~2~\     H~2~CO\          H~2~CS\            NH~3~\        HNCO\
  acetylene     formaldehyde     thioformaldehyde   ammonia       isocyanic
                                                                  acid
  ------------- ---------------- ------------------ ------------- -------------

  ---------------------- ---------------------------- -------------------
  **Molecules with Five                               
  Atoms**                                             

  HCOOH\                 HCC-CN\                      CH~4~\
  formic acid            cyanoacetylene               methane
  ---------------------- ---------------------------- -------------------

  --------------------------- ------------------------ ------------------
  **Molecules with Six                                 
  Atoms**                                              

  CH~3~OH\                    CH~3~CN\                 HC(O)NH~2~\
  methyl alcohol              methyl cyanide           formamide
  --------------------------- ------------------------ ------------------

+-----------------------------------------------------------------------+
| **Molecules with**                                                    |
|                                                                       |
| **Seven Atoms**                                                       |
+-----------------------------------------------------------------------+
| HC(O)CH~3~\                                                           |
| acetaldehyde                                                          |
+-----------------------------------------------------------------------+

+-----------------------------------------------------------------------+
| **Molecules with Ten Atoms**                                          |
+-----------------------------------------------------------------------+
| (HO)CH~2~CH~2~(OH)                                                    |
|                                                                       |
| ethylene glycol                                                       |
+-----------------------------------------------------------------------+

See http://www-691.gsfc.nasa.gov/cosmic.ice.lab/ for the most recent
list.

June, 2007