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- [9] ANTI-TUMOR AGENTS .37. ISOLATION AND STRUCTURAL ELUCIDATION OF ISOHELENOL, A NEW ANTI-LEUKEMIC SESQUITERPENE LACTONE, AND ISOHELENALIN FROM HELENIUM-MICROCEPHALUM JOURNAL OF NATURAL PRODUCTS, 1979, 42 (03): : 282 - 286
- [10] ANTI-TUMOR AGENTS .57. THE ISOLATION AND STRUCTURAL ELUCIDATION OF MICROHELENIN-E - A NEW ANTILEUKEMIC NOR-PSEUDOGUAIANOLIDE, AND MICROHELENIN-F FROM HELENIUM-MICROCEPHALUM JOURNAL OF NATURAL PRODUCTS, 1982, 45 (03): : 317 - 320