80181-31-3 Biopol NSC 179698 P(HB-co-HV) Pentanoic acid, 3-hydroxy-, polymer with 3-hydroxybutanoic acid Phb-phv copolymer Phv-phb copolymer Poly(beta-hydroxybutyrate-co-beta-hydroxyvalerate) Poly-(3-hydroxybutyrate-co-3-hydroxyvalerate) Poly-beta-hydroxybutyrate-hydroxyvalerate copolymer Polyhydroxybutyrate-polyhydroxyvalerate copolymer