SRINIVASAN, NETI, et al. “Development of a Scalable Process for a Key Intermediate of Rocuronium Bromide: A Neuromuscular Blocking Agent¦”. Asian Journal of Chemistry, vol. 21, no. 6, Mar. 2010, pp. 4399-03, https://asianpubs.org/index.php/ajchem/article/view/18178.