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. 2013 Nov 28;11(12):4698–4723. doi: 10.3390/md11124698

Figure 2.

Structures and species of STX, and its analogs, produced by marine dinoflagellates. Figure adapted from Wang (2008) [27,62].

Figure 2

Toxin R1 R2 R3 R4
Carbamate STX H H H OCONH2
Neo STX OH H H OCONH2
GTX1 OH OSO3− H OCONH2
GTX2 H OSO3− H OCONH2
GTX3 H H OSO3− OCONH2
GTX4 OH H OSO3− OCONH2
N-sulfocarbamoyl GTX5(B1) H H H OCONHSO3−
GTX6(B2) OH H H OCONHSO3−
C1 H OSO3− H OCONHSO3−
C2 H H OSO3− OCONHSO3−
C3 OH OSO3− H OCONHSO3−
C4 OH H OSO3− OCONHSO3−
Decarbamoyl dcSTX H H H OH
dcNeoSTX OH H H OH
dcGTX1 OH OSO3− H OH
dcGTX2 H OSO3− H OH
dcGTX3 H H OSO3− OH
dcGTX4 OH H OSO3− OH
Deoxydecarbamoyl doSTX H H H H
doGTX2 H H OSO3− H
doGTX3 H OSO3− H H