1. 88) in the ROESY spectrum, which further verified the backbone of MCP-1a. However, residue A, B and G constitute the side chain of MCP-1a due to important HMBC signals from H G1 (? H 4.89) to C C6 (? C 68.6) and C E6 (? C 67.4), from H B1 (? H 4.53) to C C3 (? C 77.1) and C A4;Zhang;We also observed cross peaks at H F1 (? H 5.32) and H F4 (? H 3.57), H C1 (? H 5.27) and H F4 (? H 3.57), H F1 (? H 5.32) and H C4 (? H 3.57), H F4 (? H 3.57) and H E1 (? H 5.31), H F1 (? H 5.32) and H D4 (? H 3,2021
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