The triene 3 and 6 have been syntesised in specifically labeled from and their incorporation into the macrodiolide, colletodio 1 demonstrated in cultures of Cytospora sp. ATCC 20502; results of a biomimetic reaction indicate that both colletoketol 2 and grahamimycin A17 may be biosynthesized in a single oxidation step from collectodiol.
                                    三烯 3 和 6 已被专门标记并掺入大二内酯(macrodiolide)中,colletodio 1 已在 Cytospora sp 培养物中得到证实。 A
TCC 20502;仿生反应的结果表明,colleketol 2 和 grahamimycin A17 都可以在单一氧化步骤中由collectodiol 
生物合成。