5-Bromo-4-chloro-3-indolyl-a-L-fucopyranoside , with CAS number of 171869-92-4, can be called 5-Bromo-4-chloro-3-indoxyl-alpha-l-fucopyranoside ; 5-Bromo-4-chloro-3-indolyl-alpha-L-fucopyranoside .