Fig. 2 in Spirornatas A-C from brown alga Turbinaria ornata: Anti-hypertensive spiroketals attenuate angiotensin-I converting enzyme

Fig. 2. (A–C) Key1H–1H COSY and HMBC correlations of spirornatas A-C.1H–1H COSY correlations are depicted with bold-face bonds and the HMBCs as doublebarbed arrows. (D–F) NOESY correlations (designated as single-barbed arrows) of spirornatas A-C. (G–I) Computer-generated models of spirornatas A-C (correlations are depicted with double-sided arrows), respectively using MM2 force-field calculations.