New indane and naphthalene derivatives from the rhizomes of Kniphofia reflexa Hutchinson ex Codd von Sema, Denis Kehdinga, Meli Lannang, Alain, Tatsimo, Simplice J.N., Mujeeb-ur-Rehman, Yousuf, Sammer, Zoufou, Denis, Iqbal, Urooj, Wansi, Jean Duplex, Sewald, Norbert, Choudhary, M. Iqbal

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