| Species | Ref. |
| H | Kurucz & Bell (1995) |
| atoms | Kurucz & Bell (1995) |
| van Hoof (1998) | |
| Hirata & Horaguchi (1995) | |
| CH | Jørgensen et al. (1996) |
| CN | Plez (private communication), |
| dissociation energy = 7.76 eV | |
| CO | Goorvitch (1994) |
| HCl | Sauval, compilation of |
| Le Roy (1999) | |
| Ogilvie et al. (1980) | |
| Arunan et al. (1992) | |
| H2O | AMES (Partridge & Schwenke 1997) |
| NH | Sauval, compilation of |
| Grevesse et al. (1990) | |
| Geller et al. (1991) | |
| NO | Sauval (Goldman et al. 1998a) |
| OH | Goldman et al. (1998b) |
| SiO | Langhoff & Bauschlicher (1993) |
| TiO | Schwenke (1998) |