1,4-Dioxaspiro(4.4)non-2-ylmethyl ethyl 4-(3-chlorophenyl)-1,4-dihydro-2,6-dimethyl-3,5-pyridinedicarboxylate 155506-70-0 3,5-Pyridinedicarboxylic acid, 4-(3-chlorophenyl)-1,4-dihydro-2,6-dimethyl-, 1,4-dioxaspiro(4.4)non-2-ylmethyl ethyl ester CCRIS 7975 Vulm 993