龍膽
根含裂環烯醚萜甙類苦味成份:龍膽苦甙,當藥苦甙,當藥甙,苦龍膽酯甙,痕量苦當藥酯甙。苦甙總含量可高達7.33%,而龍膽苦甙含量可達6.34%。生物鹼:龍膽鹼即秦艽鹼甲0.05%,龍膽黃鹼。
條葉龍膽
根含裂環烯醚萜甙類苦味成份:龍膽苦甙,當藥苦甙,當藥甙,苦龍膽酯甙,痕量苦當藥酯甙;苦甙總含量可達4.35%,而龍膽苦甙含量為4.15%。
三花龍膽
根含裂環烯酸萜類成份:龍膽苦甙,當藥苦甙,當藥甙,痕量苦當藥酯甙;苦甙總含量為3.95%,而龍膽苦甙含量為3.66%。還含三花龍膽甙。
滇龍膽
根含裂環烯醚萜甙類苦味成份:龍服苦甙,當藥苦甙,當藥甙,痕量苦龍膽酯甙,痕量苦當藥酯甙;苦甙總含量5.10%,龍膽苦甙含量5.01%。地上部分含龍膽鹼,秦艽鹼乙,秦艽鹼丙,β-谷甾醇。