Enocitabine (INN, marketed under the brand name Sunrabin) is a nucleoside analog used as chemotherapy.
Sunrabin contains the emulsifier HCO-60, which can cause allergic reactions.[1]
References
^Tatetsu H, Asou N, Nakamura M, et al. (July 2003). "[Allergic reaction against an emulsifier, HCO-60, contained in multamin and enocitabine]". Rinsho Ketsueki (in Japanese). 44 (7): 471–3. PMID12931567.