POLY(3-HYDROXYBUTYRATE-CO-3-HYDROXYVALERATE) POLY(3-HYDROXYBUTYRIC ACID-CO-3-HYDROXYVALERIC ACID) copolymer of (R)-3-hydroxybutyric acid + -valeric acid (9:1) copolymer of (R)-3-hydroxybutyric acid + -valeric acid 7/3 POLY(3-HYDROXYBUTYRIC ACID-CO-3-HYDROXY- VALERIC ACID), NATURAL ORIGIN, 12% PHV POLY(3-HYDROXYBUTYRIC ACID-CO-3-HYDROXY- VALERIC ACID), NATURAL ORIGIN, 8% PHV POLY(3-HYDROXYBUTYRIC ACID-CO-3-HYDROXY- VALERIC ACID), NATURAL ORIGIN, 5% PHV COPOLYMER OF (R)-3-HYDROXYBUTYRIC ACID &