19-Hydroxymanoyl oxide

Four new diterpenoid oxides have been obtained from Sideritis gomerae. They are gomeraldehyde (cnt-8,13-epoxylabdan-15-al) and gomeric acid (cnt-8,13-epoxylabdan-15-oic acid) and their 13-epimers. ent-Labda-13-en-8/8,15-diol was also isolated. 3/3-Hydroxymanoyl oxide and the 18-benzoyloxy-derivative have been obtained" from Palafoxia rosea. 

Labdane and pimarane type diterpenoids are rather rare in Turkish Sahna species, and only a few of these compounds have been obtained. Sclareol and manool were isolated from S. scktred. Manool was also obtained from S.limbaia, while manoyl oxide was reported from S. camlidissiiru/ together with 11 P-hydroxymanoyl oxide and 8,13-di-e/rr-manoyl oxide . Although these two compounds were... 

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