2a-hydroxy-2a,3-dihydro-2H,5H-1-thia-5,8,8b-triaza-acenaphthylene-4,7-dione

ethyl (2E)-2-(2-amino-4-oxo-3,5-dihydropyrimido[4,5-b][1,4]oxazin-6-ylidene)acetate

ethyl 4-[[(1Z)-1-(2-amino-4-oxo-3,5-dihydropyrimido[4,5-b][1,4]oxazin-6-ylidene)-2-ethoxy-2-oxoethyl]amino]benzoate

2-氨基-1,3-噻唑-4-乙酸乙酯盐酸盐

ethyl 4-iodo-3-methoxybut-2-enoate