Fig. 2.

¹H-NMR of geranial and neral in CDCl₃ after incubating for 7 days at 25 °C or 37 °C. There is no change in the spectrum of geranial (A) after incubating at 25 °C (II) or 37 °C (I) for up to 7 days. Similarly, there was no evidence of change from neral to geranial (B) incubated at 25 °C (II) for up to 7 days; however two new peaks at ca. 9.95 ppm characteristic of geranial begin to appear on day 7 with incubation at 37 °C (I). The ratio of these two new peaks were integrated with respect to the neral peaks at ca. 9.85 ppm and was determined to be about 1:1 indicative of 50% neral conversion to geranial by day 7 at 37 °C.