- Poly[(R)-3-hydroxybutyric acid-co-(R)-3-hydroxyvaleri c acid],(R)-3-hydroxybutyric acid: (R)-3-hydroxyvaleric acid ≥9:1 (NMR), 250mg
- Poly[(isobutylene-alt-maleic acid,ammonium salt)-co-(isobutylene-alt-maleic anhydride)],average Mw ~60, 000, 250g