We don't have synonyms for chondrin yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are chondrus, chondri and chondri-.
(n) :
(organic chemistry) A colourless, amorphous, nitrogenous substance resembling gelatin, formed from cartilaginous tissue by long-continued action of boiling water.
(n) :
(organic chemistry) A colourless, amorphous, nitrogenous substance resembling gelatin, formed from cartilaginous tissue by long-continued action of boiling water.