Diterpenoids from the aerial parts of Plectranthus ornatus.
Phytochemical investigation of a hexane extract of the aerial parts of Plectranthus ornatus yielded three new neoclerodane diterpenoids (1-3), two labdane diterpenes (4 and 5) obtained for the first time as natural products, and several previously known substances. The structures and relative stereochemistry of 1-5 were established mainly on the basis of NMR spectroscopic studies and by comparison with related compounds.
Oliveira
Patrícia M
PM
Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, CEP 31270-901, Belo Horizonte, MG, Brazil. patimo@uai.com.br
Ferreira
Alexandre A
AA
Silveira
Dâmaris
D
Alves
Rosemeire B
RB
Rodrigues
Gilberto V
GV
Emerenciano
Vicente P
VP
Raslan
Délio S
DS
D001938:Brazil; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry*; D031346:Plectranthus / Q000737:chemistry*
C501039:11R*-acetoxy-2-oxo-neocleroda-3,13E-dien-15-oic acid; C501040:11R*-acetoxy-3beta-hydroxyneocleroda-4(18),13E-dien-15-oic acid; C501038:11R*-acetoxyneocleroda-3,13E-dien-15-oic acid; D004224:Diterpenes