Type Substrate

211 - Pyrazole
212 - Pyrethroid
213 - Pyridine
214 - Pyrimidine
215 - Pyrrolidine
216 - Quinoline
217 - Retinol ester
218 - Ribose
219 - Ring opening polymerization substrate
220 - Salicylic

221 - Siderophore
222 - SNAC
223 - Stearate
224 - Steroid
225 - Strigolactone
226 - Strigolactone receptors ligand
227 - Sulfonamide
228 - Sulfonyl
229 - Sulfur Compound
230 - Surfactant

231 - Terephthalate
232 - tert-Butyl
233 - tert-Butyloxycarbonyl
234 - Tetradecanoate
235 - Tetrazol
236 - Thiazol
237 - Thiazolidine
238 - Thiophen
239 - Toxin
240 - Triacylglycerol