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. 2018 Sep 21;8(57):32637–32650. doi: 10.1039/c8ra04777d

Structures of known spinochromes.

graphic file with name c8ra04777d-u1.jpg
No. Structure elucidation R2 R3 R5 R6 R7 R8 Molecular formula Molecular mass Trivial name References
1 6-Ethyl-2,3,5,7,8-pentahydroxy-1,4-naphthoquinone OH OH OH C2H5 OH OH C12H9O7 265 Echinochrome A 7
2 2-Acetyl-3,5,6,8-tetrahydoxy-1,4-naphthoquinone COCH3 OH OH OH H OH C12H7O7 263 Spinochrome A 7
3 2,3,5,7-Tetrahydroxy-1,4-naphthoquinone OH OH OH H OH H C10H6O6 221 Spinochrome B 7
4 2-Acetyl-3,5,6,7,8-pentahydroxy-1,4-naphthoquinone COCH3 OH OH OH OH OH C12H7O8 279 Spinochrome C 7
5 2,3,5,7,8-Pentahydroxy-1,4-naphthoquinone OH OH OH H OH OH C10H6O7 237 Spinochrome D 7
6 2,3,5,6,7,8-Hexahydroxy-1,4-naphthoquinone OH OH OH OH OH OH C10H6O8 252 Spinochrome E 7
7 6-Ethyl-2,5-dihydroxy-1,4-naphthoquinone OH H OH C2H5 H H C12H10O4 218 11
8 6-Acetyl-2,5,7-trihydroxy-1,4-naphthoquinone OH H OH COCH3 OH H C12H8O6 248 11
9 6-Ethyl-2,3,5,7-tetrahydroxy-1,4-naphthoquinone OH OH OH C2H5 OH H C12H10O6 250 11
10 6-Acetyl-2,3,5,7-tetrahydroxy-1,4-naphthoquinone OH OH OH COCH3 OH H C12H8O7 264 11
11 3-Acetyl-2,5,6,7-tetrahydroxy-1,4-naphthoquinone OH COCH3 OH OH OH H C12O7H8 264 11
12 2,5,8-Tryihydroxy-1,4-naphthoquinone OH H OH H H OH C10O5H6 206 Naphthopurpurin 11
13 3-Acetyl-2,5,8-trihydroxy-1,4-naphthoquinone OH COCH3 OH H H OH C12O6H8 248 11
14 6-Ethyl-2,5,8-trihydroxy-1,4-naphthoquinone OH H OH C2H5 H OH C12O5H10 234 11
15 6-Acetyl-2,5,8-trihydroxy-1,4-naphthoquinone OH H OH COCH3 H OH C12O6H8 248 11
16 3-Ethyl-2,5,7,8-tetrahydroxy-1,4-naphthoquinone OH C2H5 OH H OH OH C12H10O6 250 11
17 2,5,7,8-Tetrahydroxy-1,4-naphthoquinone OH H OH H OH OH C10H6O6 222 Mompain 11
18 2-Hydroxy-2′-methyl-2′H-pyrano[2,3-b]naphthazarin OH OH C4-unit OH 12
19 3-Acetyl-2,7-dihydroxy-6-methyl-1,4-naphthoquinone OH CH3CO OH CH3 OH OH C13H11O7 278 12
20 6-Ethyl-3,5,6,8-tetrahydroxy-2-methoxy-1,4-naphthoquinone OCH3 OH OH C2H5 OH OH C13H12O7 280 13
21 6-ethyl-2,5,6,8-tetrahydroxy-3-methoxy-1,4-naphthoquinone OH OCH3 OH C2H5 OH OH C13H12O7 280 13
22 3,5,6,7,8-Pentahydroxy-2-methoxy-1,4-naphthoquinone OCH3 OH OH OH OH OH C11H8O8 268 Namakochrome 14
28 2,3,5,8-Tetrahydroxy-1,4-naphthoquinone OH OH OH H H OH C10H6O6 222 Spinazarin 15
29 6-Ethyl-2,3,5,8-tetrahydroxy-1,4-naphthoquinone OH OH OH C2H5 H OH C12H10O6 250 Ethylspinazarin 15
30 3-Amino-6-ethyl-2,5,6,8-tetrahydroxy-1,4-naphthoquinone OH NH2 OH C2H5 OH H C12H11NO6 265 Echinamine A 16
31 2-Amino-6-ethyl-3,5,7,8-tetrahydroxy-1,4-naphthoquinone NH2 OH OH C2H5 OH OH C12H11NO6 265 Echinamine B 16
32 2-Amino-3,5,6,7,8-pentahydroxy-1,4-naphthoquinone NH2 OH OH OH OH OH C10H7NO7 253 Spinamine E 17