open chain / opened chain / spectroscopic and chemical grounds / chemical composition / chemical shift / natural products / uncommon / chemical study / chemical examination / chemical literature / treatment of diabetes / systematic chemical examination / chemical analysis / chemical studies / The chemical examination / saponification products / /
NaturalFeature
Sierra Madre de Chiapas / Pico de Orizaba / Colima / Sierra Madre del Sur / /
Organization
Universidad Nacional Autónoma / Madre / /
Person
Alfonso Romo de Vivar / Genus Barkleyanthus Barkleyanthus / /
ProvinceOrState
New Mexico / Chihuahua / Pennsylvania / Nuevo Leon / Colima / Arizona / /
Region
southern New Mexico / southeastern Arizona / Central Mexico / southwest USA / Western Mexico / Southern Mexico / /