The addition of NaOMe gave a bathochromic shift of 30 nm (table 4) indicated of 4` - OH. Also 7-OH and catechol moiety in ring B were characterized by shift reagents of NaOAc and NaOAc/ H3BO3 respectively.
The addition of NaOMegave a bathochromic shift of 30 nm (table 4) indicated of 4`-OH. Also 7-OH and catechol moiety in ring B werecharacterized by shift reagents of NaOAc and NaOAc/ H3BO3respectively.