Abstract
Four ( 1– 4) new and seven known limonoids were isolated from the EtOH extract of the fruits of Melia toosendan. The structures of the new compounds were established on the basis of spectroscopic methods to be 12- O-methyl-1- O-deacetylnimbolinin B ( 1), 12- O-methy-1- O-tigloyl-1- O-deacetylnimbolinin B ( 2), 12- O-ethylnimbolinin B ( 3), and 1- O-cinnamoyl-1- O-debenzoylohchinal ( 4). Additionally, two new tirucallane-type triterpenoids, named meliasenins S ( 5) and T ( 6), were obtained from the same fractions during purification of the limonoids.
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