| Product name | Pine Bark Extract |
| Active ingredient | OPCS |
| Botanical source | Pinus massoniana Lamb |
| Biogenic origin | Wild in central and southern China |
| CAS NO. | Procyanidin B1:20315-25-7; Procyanidin B2: 29106-49-8 |
| Molecular formula | Procyanidin B1 Procyanidin B2 C30H26O12 |
| Characters | Red Brown powder |
| Solubility | Soluble in water, alcohol, methanol, while not soluble in non-polar solvent. |