Candidate GTs for enzymatic synthesis (2 of 3 possible linkages): 
| kre5p: S. cerevisiae SEY6210, TA405, HAB927, HAB928, HAB929, HAB930, HAB931, HAB932, HAB933, HAB934, HAB935, HAB936, HAB937 bgl2p: S. cerevisiae SEY 2101 BGLU6: A. thaliana CaUGT3: C. roseus  | 
| Orf12: E. coli O169 |