The absolute configuration of α-onocerin (I) at C-5, C-10, C-5′ and C-10′ has been established by degradation of onocerin and of abietic acid (XIV) to an identical acid, (−)-trans-[2,6,6-trimethyl-2-carboxy-cyclohexyl-(1)]-acetic acid (XIII). As the relative configuration of C-5 with regard to C-3 has also been determined, the absolute configuration of C-3 and C-3′ too is known.
通过将Onocerin和
松香酸(XIV)降解为相同的酸(-),可以确定在C-5,C-10,C-5'和C-10'处α-onocerin(I)的绝对构型。 -反-[2,6,6-三甲基-2-羧基-环己基-(1)]-
乙酸(XIII)。由于也已经确定了C-5相对于C-3的相对构型,因此也知道了C-3和C-3的绝对构型。