| Compound | Description |
|---|---|
| diphosphoric acid | |
| isopentenyl pyrophosphate | substrate for isopentenyl pyrophosphate isomerase; RN given refers to unlabeled cpd; a nonpeptide mycobacterial antigen that stimulates gamma delta T cells |
| farnesyl pyrophosphate | a sesquiterpene that dimerizes to SQUALENE; RN given refers to cpd without isomeric designation |