7-HYDROXY-6-METHOXY-2H-CHROMEN-2-ONE, TECH
7-HYDROXY-6-METHOXY-2H-CHROMEN-2-ONE, TECH ??
??
7-HYDROXY-6-METHOXY-2H-CHROMEN-2-ONE, TECH C??? ??, ??, ??
7-HYDROXY-6-METHOXY-2H-CHROMEN-2-ONE, TECH ?? ?? ? ???
???
?? ??
7-HYDROXY-6-METHOXY-2H-CHROMEN-2-ONE, TECH ?? ??
???( 0)?? ??