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Structures of lupane-type pentacyclic triterpenoids isolated from Celastraceae species (2001–2021). (a) Compounds L1, L2, L4, L6, L7, L9, L10, L13, L15, L17, L19, L22, L28, L30, L33, L39, L40, L44, L49-L51, L56, L61, L67, L74–L77, L83, L84, L87 and L88. (b) Compounds L3, L5, L8, L11, L12, L14, L16, L18, L20, L21, L23–27, L31, L32, L34–L38, L41–L43, L45–L48, L52–L54, L57–L60, L62–L66, L68–L73, L78–L82 and L85. (c) Compounds L29, L55, L86 and L89.
