乙酸酐 、
Ethandiyl-1-(3-hydroxy-6,6,9-trimethyl-7,8,9,10-tetrahydro-6H-dibenzo-2-pyran)-2-(1-hydroxy-6,6,9-trimethyl-7,8,9,10-tetrahydro-6H-dibenzo-3-pyran) 在
sodium acetate 作用下,
以90%的产率得到Ethandiyl-1-(3-acetoxy-6,6,9-trimethyl-7,8,9,10-tetrahydro-6H-dibenzo
-2-pyran)-2-(1-acetoxy-6,6,9-trimethyl-7,8,9,10-tetrahydro-6H-dibenzo-3-pyran)