gum rosin

Molecular Formula：C₂₀H₃₀O₂ | Molecular Weight： 302.451 | Synonyms：Disproportionated rosin, Colophony, Pine rosin, Rosin, Rosin Solder Flux Fume, Wood rosin, (4aR)-7-isopropyl-1,4a-dimethyl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylic acid

Gallic acid

Molecular Formula：C₇H₆O₅ | Molecular Weight： 170.1195 | Synonyms：3,4,5-Trihydroxybenzoic acid, Pyrogallol-5-carboxylic acid, Gallic Acid Anhydrous, Gallic acid(anhydrous)

Tannic acid

Molecular Formula：C₇₆H₅₂O₄₆ | Molecular Weight： 1701.1985 | Synonyms：Chinese tannin, Gallotannic acid, Gallotannin, Galloylglucose, Glycerite, Penta NM digalloyl glucose, Quebracho, Tannins, 1,3,6-tris-O-(3,4,5-trihydroxybenzoyl)hexopyranose, 1,2,3,4,6-pentakis-O-[(3,4-dihydroxy-5-{[(3,4,5-trihydroxyphenyl)carbonyl]oxy}phenyl)carbonyl]hexopyranose

Pyrogallol

Molecular Formula：C₆H₆O₃ | Molecular Weight： 126.11 | Synonyms：C.I. 76515, C.I. Oxidation Base 32, Pyrogallol [NF X], 1,2,3-Benzenetriol, 1,2,3-Trihydroxybenzene, Pyrogallic acid~1,2,3-Trihydroxybenzene, Pyrogallol solution, 1,2,3-Trihydroxybenene, Pyrogallic acid