Cyclopenta[c]pyran-4-carboxylic acid, 1,4aα,5,7aα-tetrahydro-1-hydroxy-7-(hydroxymethyl)-, methyl ester (8CI); Genipin (6CI),(1R,4aS,7aS)-methyl 1-hydroxy-7-(hydroxymethyl)-1,4a,5,7a-tetrahydrocyclopenta[c]pyran-4-carboxylate,"Genipin is an excellent natural cross-linker for proteins, collagen, gelatin, and chitosan cross-linking. It has a low acute toxicity, with LD50, therefore, much less toxic than glutaraldehyde and many other commonly used synthetic cross-linking reagents.",Genipin API