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Fig. 4 in Targeted isolation of sesquiterpene lactone dimers from Aucklandia lappa guided by LC-HRMS/MS-based molecular networking

Fig. 4. Comparison of experimental and calculated ECD spectrum of compounds 1–4.

Fig. 1 in Targeted isolation of sesquiterpene lactone dimers from Aucklandia lappa guided by LC-HRMS/MS-based molecular networking

Fig. 1. The molecular networks of the n-hexane-soluble fraction of A. lappa.

Fig. 3. Key HMBC, 1H–1H in Targeted isolation of sesquiterpene lactone dimers from Aucklandia lappa guided by LC-HRMS/MS-based molecular networking

Fig. 3. Key HMBC, 1H–1H COSY, and ROESY correlations of compounds 1–4.

Fig. 2 in Targeted isolation of sesquiterpene lactone dimers from Aucklandia lappa guided by LC-HRMS/MS-based molecular networking

Fig. 2. Structure of compounds 1–10.

Fig. 4. The X in Artemidubolides A T, cytotoxic unreported guaiane-type sesquiterpenoid dimers against three hepatoma cell lines from Artemisia dubia

Fig. 4. The X-ray ORTEP drawings of compounds 1, 2, 4, 6, 11, 15 and 18.

Fig. 1 in Artemidubolides A T, cytotoxic unreported guaiane-type sesquiterpenoid dimers against three hepatoma cell lines from Artemisia dubia

Fig. 1. Chemical structures of artemidubolides A T (1–20).

Fig. 6 in Artemidubolides A T, cytotoxic unreported guaiane-type sesquiterpenoid dimers against three hepatoma cell lines from Artemisia dubia

Fig. 6. LC-MS base peak chromatogram (BPC) of Fr.AD-5.

Fig. 2. 1H–1H in Artemidubolides A T, cytotoxic unreported guaiane-type sesquiterpenoid dimers against three hepatoma cell lines from Artemisia dubia

Fig. 2. 1H–1H COSY () and key HMBC (→) correlations of compounds 1–20.

Fig. 3 in Dimeric Erythrina alkaloids as well as their key units from Erythrina variegata

Fig. 3. The key ROESY correlations of 1 and 2 in the 3D models.

Fig. 2. 1H–1H in Dimeric Erythrina alkaloids as well as their key units from Erythrina variegata

Fig. 2. 1H–1H COSY and key HMBC correlations of 1 and 2.

Fig. 1 in Dimeric Erythrina alkaloids as well as their key units from Erythrina variegata

Fig. 1. Chemical structures of compounds 1–12.

Fig. 4 in Dimeric Erythrina alkaloids as well as their key units from Erythrina variegata

Fig. 4. Proposed biosynthesis of the dimeric alkaloids 1–10.

Fig. 4 in Isoquinoline alkaloid dimers with dopamine D1 receptor activities from Menispermum dauricum DC

Fig. 4. Experimental and calculated ECD spectra of 1 (A) and 6 (B).

Fig. 3 in Isoquinoline alkaloid dimers with dopamine D1 receptor activities from Menispermum dauricum DC

Fig. 3. The selected NOESY or ROESY correlations of compounds 1 8.

Fig. 3 in Isolation and structural elucidation of bioactive obovatol dimeric neolignans from the bark of Magnolia officinalis var. biloba

Fig. 3. Experimental and calculated ECD spectra of compounds 1–6.

Fig. 2. The 1 H– 1 H in Isoquinoline alkaloid dimers with dopamine D1 receptor activities from Menispermum dauricum DC

Fig. 2. The 1 H– 1 H COSY and key HMBC correlations of compounds 1 8.

Fig. 1 in Isolation and structural elucidation of bioactive obovatol dimeric neolignans from the bark of Magnolia officinalis var. biloba

Fig. 1. Structures of compounds 1–6.

Fig. 1 in Isoquinoline alkaloid dimers with dopamine D1 receptor activities from Menispermum dauricum DC

Fig. 1. Structures of compounds 1‒8.

Fig. 2. Key 2D in Isolation and structural elucidation of bioactive obovatol dimeric neolignans from the bark of Magnolia officinalis var. biloba

Fig. 2. Key 2D correlations of compounds 1 and 4.

Fig. 3. 1H–1H COSY and selected HMBC correlations for 1–5 in Molecular networking-based discovery of anti-inflammatory chromene dimers from Melicope pteleifolia

Fig. 3. 1H–1H COSY and selected HMBC correlations for 1–5.