Variation of the abundance of ¹⁴N along the stellar lifetime (as given by the evolution in temperature). Represented in the ordinate axis is log (¹⁴N/H) + 12. Models with a zero initial rotational velocity only change their nitrogen abundance in the red supergiant phase, whereas models with an initial rotational velocity of 410   km   s^-1 suffer an early nitrogen enhancement. Evolutionary models have masses of 60, 50, 40, 35, 30, 20, 15 and 12 M_⊙, from left to right. The position of GHV-62024 is represented by the dashed box.