| (subclass Alkaloid ChemicalBase) | Mid-level-ontology.kif 8642-8642 | 生物碱 是 化学基地 的 subclass |
| (subclass Alkaloid PlantSubstance) | Mid-level-ontology.kif 8643-8643 | 生物碱 是 植物物质 的 subclass |
| (subclass Alkaloid BiologicallyActiveSubstance) | Mid-level-ontology.kif 8644-8644 | 生物碱 是 生物活性物质 的 subclass |
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