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. 2016 Feb 4;6:20340. doi: 10.1038/srep20340

Figure 1. The biosynthetic route towards saxitoxin (STX, 1) and intermediates (2, 3, 4, 5, 6) proposed by Kellmann et al.31 with 7, which was found by us34.

Figure 1

Molecules 3, 4 and 7 were identified in the cyanobacterium A. circinalis (TA04) and the dinoflagellate A. tamarense (Axat-2), and the structure of 4 was drawn as we reported33,34.