| Lab compound |
| Octane, e.g. |
| Pentane, e.g. |
| Butylene e.g. |
| Chemical cousin |
| Chemical 'twin' |
| Certain nuclide |
| Compound variant |
| Nuclear compound |
| Variant compound |
| Similar compound |
| Related compound |
| Chemical compound |
| Chemical relative |
| Alanine or dioxin |
| Chemical "anagram |
| Chemist's compound |
| Chemical variation |
| Compound variation |
| Beta carotene, e.g. |
| Radioactive nucleus |
| Fructose, to glucose |
| Chemistry test topic |
| Cousin of a compound |
| Glucose, to fructose |
| Beta carotene, for one |
| Neopentane, to pentane |
| Multiple-formed compound |
| Diethyl ether, to butanol |
| Compound's close relative |
| Beta carotene, to carotene |
| Ethanol, to dimethyl ether |
| Chemically related compound |
| Phenanthrene, to anthracene |
| Compound related to another |
| Compound resembling another |
| Compound similar to another |
| Fraternal twin, in chemistry |
| Compound with multiple forms |
| Fulminic acid, to cyanic acid |
| Chemistry exam topic, perhaps |
| Methylpropane, vis-à-vis butane |
| 1-bromopropane, to 2-bromopropane |
| One of chemically related compounds |
| Compound related to another compound |
| Chemical compound — I'm Eros (anag) |
| Ethanol, in relation to dimethyl ether |
| Chemical compound resembling another one |
| Same compound with a different arrangement of atoms |
| Compound that resembles another, but is structurally different |