title: New triterpenoids from the orchids Scaphyglottis livida and Nidema boothii.
abstract: Two new triterpenoids, nidemin (1), a modified lanostane, and 9,19-cyclolanosta-24,24-dimethyl-25-en-3beta-yl trans-p-hydroxycinnamate (2) have been isolated from the orchids Nidema boothii and Scaphyglottis livida, respectively. The isolates were characterized by spectral methods. The structure of nidemin (1) was unambiguously confirmed by X-ray analysis.
authors: Facultad de Química, Universidad Nacional Autónoma de México, México, DF.
authors: Samuel
authors: S
authors: Estrada
authors: Laura
authors: L
authors: Acevedo
authors: Mitzi
authors: M
authors: Rodriguez
authors: Ruben A
authors: RA
authors: Toscano
authors: Rachel
authors: R
authors: Mata
mesh_terms: D002855:Chromatography, Thin Layer; D018360:Crystallography, X-Ray; D006868:Hydrolysis; D013058:Mass Spectrometry; D008800:Mexico; D008968:Molecular Conformation; D015394:Molecular Structure; D029595:Orchidaceae / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D013237:Stereoisomerism; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C469967:9,19-cyclolanosta-24,24-dimethyl-25-en-3-ylhydroxycinnamate; D013256:Steroids; D014315:Triterpenes; C469966:nidemin