Isomeric ent‐Labdane‐Type Diterpenoids from the Stems of Rhizophora mucronata |
| |
| Authors: | Ankireddy Madhu Annam Suresh?Chandra?Venkata?Appa?Rao Sukki Sushma Ponnapalli Mangala?Gowri Tuniki Venugopal?Raju |
| |
| Institution: | 1. Natural Products Chemistry Division, Indian Institute of Chemical Technology, Hyderabad‐500607, India (phone: +91‐40‐27191735;2. fax: +91‐40‐27160512);3. NMR Division, Indian Institute of Chemical Technology, Hyderabad‐500607, India |
| |
| Abstract: | Two new constitutional isomers of ent‐labdane‐type diterpenoids, 1 and 2 , with an unusual seven‐membered lactone moiety (i.e., 1 ), together with two known compounds, 3 and 4 , were isolated from the acetone extract of Rhizophora mucronata. Their structures were elucidated as rhizomucronol A and B ( 1 and 2 , resp.) by spectroscopic analyses and chemical evidence. The absolute configuration of 2 was established by applying the Mosher ester procedure. |
| |
| Keywords: | Rhizophora mucronata Diterpenoids Labdanes |
|
|
