the very first intermediate is methanol (produced chemically in one step via hydrogenation in this paper, using a known method) so you can just use methanol to

the very first intermediate is methanol (produced chemically in one step via hydrogenation in this paper, using a known method) so you can just use methanol to polymers via method of choice, e.g. [0] no need to convert to starch first. [0] https://pubs.acs.org/doi/10.1021/acscatal.5b00007 https://pubs.acs.org/doi/10.1021/acscatal.5b00007