reagent derivatized residue Michael addition of t-butyl hydroxylated BHT (BHTOH) to C, H or K 234.1619873046875 234.339996337890625 BHTOH C 15 H 22 O 2 MOD:00931 Michael addition of t-butyl hydroxylated BHT (BHTOH) to C, H or K PSI-MOD Unimod:498 X artifact modification from Unimod Other - BHTOH is formed upon metabolism of BHT with P450 enzymes. The BHTOH is further metabolized to its quinone methide (electrophile) which reacts with -SH and -NH2 groups