7-(7-Formyl-2,3-di-p-tolyl-5H-pyrrolo[2,3-b]pyrazin-5-yl)heptanoic acid (Example 2.1) (42 mg, 0.092 mmol) in EtOH (1 ml) was degassed with N2 and treated with sodium borohydride (5.23 mg, 0.138 mmol). After stirring at RT for 16 hours, the mixture was added to water (30 ml) and the pH was adjusted to pH 1 using 2M HCl. The aqueous portion was extracted with DCM (×3) and the combined extracts were concentrated under reduced pressure. The crude product was triturated with EtOAc/iso-hexane to afford the titled compound as an orange solid;
