Robuta

https://www.ncbi.nlm.nih.gov/books/NBK552703/figure/fig-2-01/ Figure 1, [Chitosan (CASRN 9012-76-4; Chemical Formula: [C6H11NO4]n)]. - NTP Technical Report on... Chitosan (CASRN 9012-76-4; Chemical Formula: [C6H11NO4]n)