8’-Hydroxyabscisic acid

ABA is metabolized via the unstable intermediate 6 -hydroxymethyl -ABA, more recently called hydroxyabscisic acid (HOABA) by Hirai et al. (45), to phaseic acid (PA). In certain plants the latter compound is further converted to 4 -dihydro-phaseic acid (DPA) which accumulates as the end product. The ABA-> PA DPA pathway (Figure 4) operates in beans (46), in pea seedlings (47), in ash seeds (48), in castor bean (49), and... 

The catabolic inactivation of ABA in plants is initiated by hydroxylation at C-8 to produce 8 -hydroxyabscisic acid [8 -HOABA (24)]. 8 -... 

Degraded Carotenoids. Several new natural products have structures similar to carotenoid end-groups and thus may be considered as degraded carotenoids. A new abscisic acid (31) metabolite from seeds of Robinia pseudacacia has been identified as the 3-hydroxy-3-methylglutaryl ester of hydroxyabscisic acid (32). 

Hieracin I, H-80087 Hirsutinolide, H-80089 4a-Hydroperoxydesoxyvulgarin, in V-80013 7 -Hydroxyabscisic acid, H-70098 8 -Hydroxyabscisic acid, H-70099 Psilostachyin, P-70131 Secoisoerivanin pseudoacid, S-70024... 

---