Type Substrate

241 - Pyrazole
242 - Pyrethroid
243 - Pyridine
244 - Pyridinium
245 - Pyrimidine
246 - Pyrrolidine
247 - Quinoline
248 - Retinol ester
249 - Rhodamine derivative
250 - Ribose

251 - Ring opening polymerization substrate
252 - Salicylic
253 - Siderophore
254 - Sinapyl
255 - SNAC
256 - Stearate
257 - Steroid
258 - Stigmine
259 - Strigolactone
260 - Strigolactone receptors ligand

271 - Tetrazol
272 - Thiazole
273 - Thiazolidine
274 - Thiocholine reactant
275 - Thiophen
276 - Toxin
277 - Triacylglycerol
278 - Triazine
279 - Triazol
280 - Trichloro