| Spinosyn D 17-pseudoaglycone | W3729CYR4M | chemical |
| Spinosyn E | MYF6L73SA2 | chemical |
| Spinosyn F | LVG8V3F6H4 | chemical |
| Spinosyn G | 8FVR5YD6KF | chemical |
| Spinosyn H | 958UE6JXM2 | chemical |
| Spinosyn J | 6BXM9DF528 | chemical |
| Spinosyn K | 7LT8V34RK6 | chemical |
| Spinosyn L | E6A2QVR7FU | chemical |
| Spinosyn Q | XZ9SHM4AHV | chemical |
| Spirendolol | 96789094BR | chemical |
| Spirendolol, (R)- | S26DNF62ZM | chemical |
| Spiro(1,3-benzodioxole-2,1'-cyclohexane) | N979VA5PEP | chemical |
| Spiro(3H-2,1-benzoxathiole-3,1'-cyclohexane), 1,1-dioxide | KGG4S6DU5U | chemical |
| Spiro[1,3,5,11-tetrazatricyclo[7.4.0.0<SUP>2,7</SUP>]trideca-2,4,6,8-tetraene-13,1'-cyclohexane]-10-one | GFW5M8GBS9 | chemical |
| Spiro[1H-pyrrolo[2,3-b]pyridine-3,6'-5,7-dihydrocyclopenta[b]pyridine]-2-one, (3S)- | ZD8R5KD2ET | chemical |
| Spiro[2.4]heptan-4-ol | SYS7KV978S | chemical |
| Spiro[4.4]nonan-1-ol, (R)- | NDF2MCN7Z8 | chemical |
| Spiro[4.4]nonan-1-ol, (S)- | U2NBL4PEM8 | chemical |
| Spiro[4.5]decan-1-ol | XRG6SL66SR | chemical |
| Spiro[4.5]decan-6-one | HEH3ZA5SQB | chemical |
| Spiro[5.5]undeca-1,4-dien-3-one | 7A5EX6AXU4 | chemical |
| Spiro[6,16-(epithiopropanoxymethano)-7,13-imino-12H-1,3-dioxolo[7,8]isoquino[3,2-b][3]benzazocine-20,1?-[1H]pyrido[3,4-b]indole]-14-carbonitrile, 5-(acetyloxy)-2?,3?,4?,6,6a,7,9?,13,14,16-decahydro-6?,9-dimethoxy-8-(methoxymethoxy)-4,10,23-trimethyl-19-oxo-, (1?R,6R,6aR,7R,13S,14R,16R)- | GPX66GJ9DZ | chemical |
| Spirobudifen | QA988VVU4D | chemical |
| Spirodecanedione | 65G3VZ9MEX | chemical |
| Spirohydantoin aziridine | 5YQ4XHX2X7 | chemical |
| Spironolactone | 27O7W4T232 | chemical |
| Spironolactone H-3 | HP84A7VHS3 | chemical |
| Spiropentadiene | US9R6MF2C7 | chemical |
| Spodoptera litura whole | LB5H2YVZ2E | structurallyDiverse |
| Spondias macrocarpa whole | 2TC4RJ4YPC | structurallyDiverse |
| Spunoleucel | EVQ94BW5G4 | structurallyDiverse |
| Squalane | GW89575KF9 | chemical |
| Squalene | 7QWM220FJH | chemical |
| SsaV (Salmonella enterica subsp. enterica serovar Typhi str. Ty2) | Z4Z2FXT4FS | protein |
| Stacofylline | C7K8PK4Q0E | chemical |
| Stacofylline hydrochloride | 757KH2L9HX | chemical |
| Stannane, chlorotris(2-methyl-2-phenylpropyl)- | C26K7UAU4D | chemical |
| Stannic Chloride Sn-113 | 38KVY8X3A6 | chemical |
| Stannic Protoporfin | DIO3JT9G2P | chemical |
| Stannous chloride anhydrous | R30H55TN67 | chemical |
| Staphisagria macrosperma leaf | L56I558JIX | structurallyDiverse |
| Staphisagria macrosperma seed | 00543AP1JV | structurallyDiverse |
| Staphisagria macrosperma whole | S84466IK8U | structurallyDiverse |
| Staphylea arguta whole | B4H3NWK47D | structurallyDiverse |
| Staphylococcus epidermidis ATCC-12228 | 6A7CHT5C5V | structurallyDiverse |
| Staphylococcus phage SA11 | 67TN8ML6CQ | structurallyDiverse |
| Staphylococcus phage Stau2 | HB48FD2TSJ | structurallyDiverse |
| Staphylokinase | MNV2QF5GB7 | protein |
| Stapokibart | L2REN9TU2D | protein |
| Starmarella bombicola | V4PN2TU66C | structurallyDiverse |