*croconic acid; Colmenero et al.; theroretical spectrum* data provided by F. Colmenero; for details see paper.
nm		Absorption (cm-1)
200.3780286	26717.5723540
200.9384141	21514.3361818
201.5019428	16813.9388923
202.0686083	12751.2421358
202.6385031	9435.2717270
203.2116215	6890.6012740
203.7879574	5045.5464664
204.3676055	3760.0090898
204.9505266	2872.2165518
205.5368166	2239.2332175
206.1264706	1760.6110798
206.7194831	1381.3150802
207.3159522	1081.6831625
207.9158734	860.4503643
208.5192417	718.7985773
209.1261573	649.7210103
209.7365808	635.4978980
210.3506139	652.8489865
210.9682529	681.4867502
211.5894936	710.5227540
212.2144401	739.6195292
212.8430893	774.3915241
213.4754373	819.1570723
214.1115908	871.6411643
214.7515099	922.3985392
215.3953029	959.4407538
216.0429676	974.9600107
216.6945010	970.2342641
217.3500142	955.6647313
218.0095053	946.6285293
218.6729721	957.5566601
219.3405283	997.0444414
220.0121337	1066.2192986
220.6879038	1159.4735405
221.3678380	1267.3781916
222.0519351	1379.4721367
222.7403135	1486.7075860
223.4329330	1582.4257015
224.1299138	1662.3351824
224.8312566	1724.8112170
225.5369615	1771.8791049
226.2471517	1809.6837212
226.9618286	1847.3772459
227.6809932	1893.5043584
228.4047719	1952.8584580
229.1331245	2025.7628603
229.8661799	2111.2038739
230.6039408	2210.3288093
231.3464096	2327.0540203
232.0937182	2464.5561737
232.8458704	2619.7294364
233.6028696	2779.6171968
234.3648512	2921.8118046
235.1317754	3018.6476247
235.9037803	3042.6505413
236.6808714	2973.2824902
237.4630535	2804.4175684
238.2504684	2550.4232878
239.0431228	2246.7783553
239.8410226	1941.7029689
240.6443137	1681.5519846
241.4529566	1497.3076125
242.2670998	1398.6903422
243.0867519	1376.6234608
243.9119211	1410.1896969
244.7427598	1473.6851523
245.5792780	1543.1050541
246.4214852	1602.4213957
247.2695383	1647.8019072
248.1233990	1688.3369833
248.9832271	1741.5208223
249.8490351	1826.8739145
250.7208349	1959.6691510
251.5987911	2145.9241171
252.4829175	2378.4993430
253.3732278	2634.7759702
254.2698913	2880.8227015
255.1728713	3086.3664635
256.0823404	3247.8038775
256.9983157	3407.2496334
257.9208135	3656.1113210
258.8500118	4121.3243561
259.7859295	4949.8118920
260.7285848	6328.8563103
261.6781614	8617.1117181
262.6346243	12653.5531206
263.5981608	18929.4869953
264.5687933	25620.4591482
265.5465436	31729.2037179
266.5316048	37337.1463238
267.5240014	42596.0354115
268.5237577	47589.6566313
269.5310729	52361.5273572
270.5459151	56945.9692557
271.5684878	61380.9544189
272.5988197	65704.6867415
273.6369393	69942.8455755
274.6830567	74101.0258813
275.7372035	78171.2511545
276.7994106	82149.9213783
277.8698953	86053.2893652
278.9486294	89916.0116083
280.0358350	93767.2920362
281.1315486	97599.0767646
282.2358061	101350.1333305
283.3488374	104920.5598493
284.4706822	108212.2669932
285.6013798	111172.9216853
286.7411681	113823.9342771
287.8900234	116262.3492904
289.0481892	118632.3842273
290.2157110	121072.9600023
291.3926343	123659.2559199
292.5792111	126367.8360052
293.7754912	129082.8079010
294.9815238	131626.9225886
296.1975702	133784.2735104
297.4236129	135304.3128566
298.6599196	135917.7840930
299.9065472	135409.0061808
301.1635523	133754.3328829
302.4312125	131277.5305946
303.7095895	128716.5532888
304.9987448	127066.8304325
306.2989665	127134.4490249
307.6102452	129010.0492510
308.9328764	131958.5276171
310.2669305	134891.6274504
311.6124779	136961.0763861
312.9698257	137852.9052800
314.3390501	137773.6319644
315.7202274	137257.0875984
317.1136768	136902.3275604
318.5193991	137140.4154524
319.9377222	138133.4606144
321.3687330	139836.1104095
322.8125184	142127.8036925
324.2694200	144876.7890051
325.7395315	147890.1312089
327.2229473	150840.2337996
328.7200230	153283.1714594
330.2307721	154780.6731046
331.7555606	155047.6278498
333.2944953	154053.5310737
334.8476836	152064.3209521
336.4155070	149635.1700101
337.9980812	147537.2368549
339.5955223	146560.3487748
341.2082286	147187.9891123
342.8362304	149297.0796696
344.4799377	152149.5752685
346.1394822	154739.7050394
347.8149964	156248.2502685
349.5069090	156317.4653062
351.2153622	155053.2245604
352.9404995	152806.8531232
354.6827694	149864.2805570
356.4422234	146215.9355401
358.2193239	141543.9691476
360.0142332	135421.8147329
361.8271149	127588.2051842
363.6584534	118144.9974052
365.5084244	107607.5818572
367.3772048	96793.8023636
369.2653028	86576.6937345
371.1727974	77578.8468936
373.1002135	69953.0263757
375.0477513	63398.1933767
377.0156130	57426.1606398
379.0043500	51696.9999585
381.0141793	46192.9953214
383.0453198	41142.9727787
385.0983516	36795.6997665
387.1733885	33213.6367641
389.2710307	30211.4939842
391.3915262	27450.7237161
393.5351254	24610.6678428
395.7024606	21521.4399225
397.8938006	18203.8484970
400.1094172	14820.0785343
402.3499773	11586.0090984
404.6156403	8694.0076001
406.9070976	6268.4037600
409.2246571	4355.6628307
411.5686308	2934.7662417
413.9397492	1937.0790073
416.3383467	1268.8677407
418.7647624	833.3845387
421.2197693	548.7913169
423.7035861	357.4005644
426.2170159	225.0821140
428.7604432	133.9423469
431.3342583	73.9196596
433.9393126	37.3175337
436.5760247	17.0891841
439.2448196	7.0574671
441.9466015	2.6194033
444.6816668	0.8752747
447.4509572	0.2554430
450.2549557	0.0682257