a. alternata

Methyl 4-hydroxycinnamate is an esterified derivative of p-coumaric acid isolated from the flowers of Trixis michuacana var. longifolia, exhibiting antibacterial and anti-melanogenesis properties.

Altertoxin I (Dihydroalterperylenol) is a quinone-type mycotoxin produced by the fungi Alternaria alternata. It exhibits mutagenic and cytotoxic properties and can mildly disrupt metabolic communication.

4'-Demethylpodophyllotoxone, an intermediate in the biotransformation pathway of Alternaria alternata S-f6, undergoes further modification with 4-(2,3,5,6-tetramethylpyrazine-1) (4-TMP). This modification yields a novel compound that exhibits potent inhibitory effects on the human gastric cancer cell line BGC-823 [1].

(3ξ,4ξ,5ξ,6ξ,7ξ,11ξ)-3,6-Dihydroxy-8-oxo-9-eremophilene-12-oic acid, a phytotoxin recently identified in Alternaria alternata ssp. tenuissima isolates, is linked to fruit spots on apples.

A mixture of (E)-octadecyl p-coumarate and (Z)-octadecyl p-coumarate has antifungal activity , it shows the dose dependent inhibition of the spore germination of Alternaria alternata and A. porri.

Altertoxin III is a mutagenic agent that induces mutations in Salmonella typhimurium strains TA98, TA100, and TA1537. It is isolated from extracts of A. alternata strains that demonstrate mutagenic responses in the Ames Salmonella typhimurium test.