正丁胺 、
(6S*,9aS*)-5,6-dihydro-3-[(1Z,4E,6E,8E)-1-hydroxy-3-oxo-1,4,6,8-decatetraenyl]-6-hydroxymethyl-9a-methyl-2H-furo[3,2-g]benzopyran-2-9(9H)-dione 以
乙腈 为溶剂,
以17%的产率得到rel-(S,Z)-6-((butylamino)methylene)-5-((S)-2,3-dihydroxypropyl)-3-((1Z,4E,6E,8E)-1-hydroxy-3-oxodeca-1,4,6,8-tetraenyl)-7a-methylbenzofuran-2,7(6H,7aH)-dione