Chemical constituents of the Korean endangered species Rhododendron brachycarpum

• A new compound β-sophorosyl ent-16-α-hydroxykauran-18-oate is discovered.
• A wide array of phytochemical entities are identified in this study.
• Some compounds can update the current chemotaxonomic profile of Ericaceae.
• This study warrants useful chemical markers for the authentication.
• Endangered plant species can produce chemotaxonomically significant entities.

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