| 1 | 289-02-1 | 1,4,2-Dioxazole | 1,4,2-Dioxazole | | | |
| 2 | 289-04-3 | 1,3,4-Oxathiazole | 1,3,4-Oxathiazole | C2H3NOS | | |
| 3 | 289-06-5 | THIADIAZOLE | 1,3,4-Thiadiazole | C2H2N2S | | |
| 4 | 289-11-2 | 1,4,2-Oxathiazole | 1,4,2-Oxathiazole | | | |
| 5 | 289-13-4 | 1,3,4-Selenadiazole | 1,3,4-Selenadiazole | C2H2N2Se | | |
| 6 | 289-14-5 | 1,2,4-trioxolane | 1,2,4-trioxolane | C2H4O3 | | |
| 7 | 289-16-7 | 1,2,4-Trithiolane | 1,2,4-Trithiolane | C2H4S3 | | |
| 8 | 289-19-0 | // | 1H-Pentazole | HN5 | | |
| 9 | 289-22-5 | Cyclopentasilane Discontinued (Explosive) | Cyclopentasilane Discontinued (Explosive) | H10Si5 | 水分保持剂;试剂盒-Elisa试剂盒;热压敏及感光材料-感光材料及中间体 | |
| 10 | 289-24-7 | Aluminum, 1,3-pentadien-1-yl-5-ylidene- (9CI) | Aluminum, 1,3-pentadien-1-yl-5-ylidene- (9CI) | C5H5Al | | |
| 11 | 289-31-6 | 1-Arsabenzene | 1-Arsabenzene | | | |
| 12 | 289-52-1 | Bismin | Bismin | C5H7Bi | | |
| 13 | 289-56-5 | 1,3,5-Trioxa-2,4,6-triboracyclohexane | 1,3,5-Trioxa-2,4,6-triboracyclohexane | B3H3O3 | | |
| 14 | 289-59-8 | | Borthiin | C4H5BS | | |
| 15 | 289-62-3 | | Germin, hexahydro- | C5H12Ge | | |
| 16 | 289-65-6 | 4H-吡喃 | 4H-pyran | C5H6O | | |
| 17 | 289-66-7 | 2H-Pyran | 2H-Pyran | | | |
| 18 | 289-67-8 | Pyrylium | Pyrylium | C5H5O | | |
| 19 | 289-68-9 | Phosphabenzene | Phosphabenzene | C5H5P | | |
| 20 | 289-70-3 | | 4H-Thiopyran | C5H6S | | |
| 21 | 289-72-5 | | 2H-Thiopyran | C5H6S | | |
| 22 | 289-73-6 | | 1λ4-Thiopyran | C5H6S | | |
| 23 | 289-74-7 | 蜕皮激素 | Hydroxyecdysone | C5H5S+ | 植物提取物 | |
| 24 | 289-75-8 | Antimonin | Antimonin | | | |
| 25 | 289-77-0 | Silabenzene | Silabenzene | C5H6Si | | |
| 26 | 289-78-1 | stannin | stannin | C5H5Sn | | |
| 27 | 289-80-5 | 哒嗪 | Pyridazine | C4H4N2 | 哒嗪;合成;大货;化工原料 | |
| 28 | 289-81-6 | 4H-1,2-Oxazine | 4H-1,2-Oxazine | | | |
| 29 | 289-82-7 | 2H-1,2-Oxazine | 2H-1,2-Oxazine | | | |
| 30 | 289-83-8 | 6H-1,2-Oxazine | 6H-1,2-Oxazine | | | |
| 31 | 289-86-1 | | 1,2-Thiazin-1-ium (8CI,9CI) | C4H4NS | | |
| 32 | 289-87-2 | | 1,2-Dioxin | C4H4O2 | | |
| 33 | 289-89-4 | 1,2-Oxathiin | 1,2-Oxathiin | | | |
| 34 | 289-93-0 | | 1,2-Dithiin | C4H4S2 | | |
| 35 | 289-95-2 | 嘧啶 | Pyrimidine | C4H4N2 | 嘧啶;医药中间体 | 医药中间体 |
| 36 | 289-96-3 | 1,2,3-Triazine | 1,2,3-Triazine | C3H3N3 | | |
| 37 | 289-98-5 | 2H-1,2,6-Oxadiazine | 2H-1,2,6-Oxadiazine | C3H4N2O | | |