Identification and Biosynthesis of Cholest-4-en-3-one and 6-Oxocholetanol in Young Tomato Plants

474 and prominent ions at 459, 445, 384, 221 159at the same GC retention time (19.51 min) as that of authentic 6-oxoCHN TMSi ether (Table 1). Therefore, the compound was identified as 6-oxoCHN. Without derivatization, a compound in HPLC fraction 37 - 39 evidenced a molecular ion at