12.01.23
US Patent No. 11,826,453 B2 (Guoqiang Chen, Yudong Wang); Conopco, Inc., Englewood Cliffs, NJ, has patented a hair care composition comprising: a compound of formula 1 (show below), which may exist in amide form A or enol form B; a photolabile antidandruff agent (piroctone olamine); and a cosmetically acceptable carrier.